Patent EP-1081077-A2 (EP)
Inventor: BERNERT RICHARD
IPC: D21G1/02
Filed: 2000-08-03
Abstract: The carrier beam assembly (10) for a machine unit, at a machine for the prodn. and/or finishing of paper or cardboard webs, has one carrier beam (12) to take the machine unit and a second beam (14) to support the first. The first carrier beam is around the second beam, at least in sections. The two beams are of a plastics with reinforcement fibers pref. of glass or carbon. When the two beams are not under load, their axes are generally parallel where they are together. The beam structure has supports (16) between the two beams, pref. at a set gap from the ends of the first beam, with at least two supports along the longitudinal line, symmetrical to the longitudinal center of the first beam. The gap between the supports and the ends of the first beam is 15-30% of the beam length, and pref. 25%. The gap can be varied between at least one support and the beam end, using a mechanical and/or electrical and/or fluid setting system. The first carrier beam is supported at the second beam by at least two pairs of supports, each with two support units at the same or different longitudinal setting in each pair. At least one support is structured and/or shaped to transfer the forces and/or moments between the two beams, in both directions. The two beams are fitted together to prevent relative rotation between them. At least one support incorporates a pref. plastics damper, with a more rigid component compared with the damper elasticity working together to support the first beam on the second. The second beam can have a rotation around its longitudinal axis, parallel to the axis of the first beam, or it is on a swing mounting, with the rotating or swing axis on the force line between the supported machine section and the foundation. Where the supported machine section is a doctor unit, the line between the unit and the foundation runs through the tip of the doctor blade. The second beam is mounted on bearing pedestals (18,20) at the guide and drive sides of the machine, together with mechanisms to adjust and/or position it. At least one setting unit acts on the longitudinal center of the second beam. The setting system can register a shift in the supported machine section through bending of the second beam, with an evaluation unit which processes the monitor signals to adjust the setting systems accordingly. The setting systems also have monitors to determine the working condition of the machine using the parameters of machine speed and/or linear pressures and/or the beam position and/or the like, where the condition signals are evaluated for a correction to the setting systems. The first beam has openings along its length, for access to the second inner beam. The second beam has a tubular structure, at least in sections, with an outer contour which generally matches the inner contour of the outer beam, at least where they are together. An Independent claim is included for the control of the position and/or alignment of the support beam assembly, where a bend in the second inner beam is used to determine the position of the supported machine section, for correction signals to be sent to the setting systems by the evaluation unit, and the carrier beam structure is positioned accordingly. Preferred Features: The working condition of the supported machine is determined by operating parameters, for the evaluation unit to adjust the setting systems to correct any deviations.