摘要:
A method and apparatus are described for controlling a coating head, which exerts a nip pressure to a fibrous web to be coated (102) while the fibrous web is supported by a backing roll (101). An output signal of a sensor (105) integrated within the backing roll (101) is read, thus producing a measured indication of the nip pressure. A number of actuator control values are derived at least partly from said measured indication of the nip pressure. Said actuator control values are delivered as commands to a number of respective actuators (803) that contribute to creating the nip pressure, to control an amount of a coating substance on the fibrous web (103) in the coating head.
摘要:
A disc filter comprises a supply box (11) and a vat (8), whereby fibre pulp suspension to be supplied into the disc filter (1) is supplied to the vat (8) through the supply box (11). The disc filter (1) comprises at least one flow control element (30, 32, 44, 49) arranged to act on at least part of the flow (F) of the fibre pulp suspension to be supplied through the supply box (11) to the vat (8). Also a method for supplying fibre pulp suspension into a disc filter (1).
摘要:
The invention relates to a stopping device (10) for a segmented roll in a fibre-web machine for assisting the stopping of the rotation of one or more roll segment(s) (52) of the segmented roll (50). The stopping device comprises at least one braking device (12), by means of which the roll segment (52) can be stopped, and at least one surface contact member (14, 14'), which surface contact member is connected to said braking device, and the stopping device further comprises actuators (16) for optionally bringing/releasing the surface contact member into/from surface contact with the shell of one or more roll segment(s) (52). The invention also relates to a segmented roll assembly (60) in a fibre-web machine, in which the segmented roll (50) comprises at least two, independently from one another rotatable roll segments (52) that are located end-to-end substantially in the transverse direction of the fibre- web machine.
摘要:
The present invention relates to a method for controlling a tension profile of a web comprising the steps heating and calendering the web so as to plasticize the web, measuring the tension profile of the web, and profiled treatment of the web in accordance with the measured tension profile of the web in the width direction of the web by profiled heat treating the web or/and profiled application of a mechanical force. Further, the present invention relates to a corresponding web tension profile control apparatus.
摘要:
The invention relates to a safety component for controlling movements of machines, which movements are provided by a fluid system. The safety component (10) is arranged by means of at least one digital valve group (DV).
摘要:
A drive device is proposed which comprises a roll (10) for transporting material, and a variable reluctance motor including a stator (20) and a rotor (10a), said rotor comprising salient poles (30), wherein the roll comprises a shaft part (10b) and the rotor.
摘要:
A reel-up (1 ) for reeling up a fibre web (W) continuously around a reel spool (5) into a machine reel (6), which reel-up (1) comprises: - a reeling drum (10) for forming a nip (N) with the machine reel (6) being reeled up, - a frame (20) which is arranged for supporting the machine reel (6) and to which frame (20) is connected a roller rail (23) along which the reel spool (5) operating as the core of the machine reel (6) is movable in the x direction by rolling bearing housings (58) of the reel spool (5), - in which reel-up (1) the fibre web (W) is reelable up oscillatingly into the machine reel (6), whereby - the roller rail (23) is arranged movable in the y direction in relation to the frame (20) for providing an oscillating path of the reel spool (5).