Metso Paper Inc.

Valmet Technologies Oy

Valmet Technologies, Inc.

Tatu Pitkänen

Petteri Lannes

Marko Tiilikainen

Heikki Kettunen

Topi Tynkkynen

Matti Innala

Jari Tiitta

Teppo Kojo

Rami Vanninen

Toni Heikkilä

Todd Vandenheuvel

Matti M Kemppainen

Jorma Kinnunen

Petri Enwald

Tapio Mäenpää

Pekka Ruha

Jussi Koskelainen

Gerald Kramer

John K Shakespeare

Jyrki Saloniemi

Risto Mäkinen

Hannu Kasula

Reijo Huuskonen

Ilkka Naatti

Olli Niemi

Petri Päivä

Petri Asikainen

Marko Rintanen

Kari Röyskö

Markus Nylund

James Sipprell

Kaale Nieminen

René Graichen

Seppo K Parviainen

Risto Kovanen

Markku Tuhkala

Antti Kontto

Mikko Kaasalainen

A method for monitoring a machine element in a paper finishing machine (). The machine element mounted for rotation machine elements (-) equipped with a sensor assembly () measuring force or pressure, and a counter-pair () for said machine element. The machine element is made to rotate against the counter-pair, a measurement signal () is generated between the machine element and the counter-pair with the sensor assembly, and recording a reference cross-directional profile () of force or pressure generated. Condition monitoring () of vibration with the reference profile is by comparison of current signals with the reference so as to detect periodic variation () in the cross-directional pressure profile, and producing visual information () from the analysis for monitoring. The invention also relates to a corresponding system, a rotating machine element for the method or the system, and a computer program product.

Method, system and a computer program product for condition monitoring of a fiber web or paper finishing machine

The invention relates to a method for monitoring the condition of a continuous element () moving in a fiber web or paper finishing machine, said monitoring being performed with a rotating machine element (), which is equipped with a sensor assembly () that measures force or pressure and against which the continuous element moves. In the method, the machine element is made to rotate against the continuous element, a measurement signal () is generated between the machine element and the continuous element with the sensor assembly, and a cross-directional profile () of force or pressure generated between the machine element and the continuous element is formed from the measurement signal. Said moving continuous element is a fabric () installed in a fabric run () traveling via the machine element. In the method, the fabric is additionally installed in a fabric run, wherein it moves via said machine element equipped with a sensor assembly, a reference profile () is formed for the cross-directional profile after installing the fabric in the fabric run, the cross-directional profile formed from the measurement signal and representing force or pressure generated between the machine element and the fabric is compared with the reference profile, and information () is produced from the comparison for monitoring the condition of the fabric. The invention also relates to a corresponding system and a computer program product.

Method, system and a computer program product for condition monitoring of a continuous element moving in a fiber web or paper finishing machine

A perforated roll () of a fiber web machine includes a roll shell (), holes () extending through the roll shell, and a sensing system () arranged in the roll shell. The sensing system () includes at least one pair of leads (), to which one or more sensors () have been connected. At least one pair of leads is composed of flat leads (), which are arranged in the roll shell side by side. A prefabricated sensor sheet () may be prepared for a perforated roll of a fiber web machine, such that holes may be drilled therethrough to communicate with the roll shell holes ().

Arrangement in a perforated roll of a fiber web machine and prefabricated sensor sheet for a perforated roll of a fiber web machine

A method and apparatus are described for controlling a coating head, which exerts a nip pressure to a fibrous web to be coated while the fibrous web is supported by a backing roll. An output signal of a sensor integrated within the backing roll 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 that contribute to creating the nip pressure, to control an amount of a coating substance on the fibrous web in the coating head.

Method and apparatus for controlling a coating head, and a coating head

A method and an apparatus for controlling the cross-directional nip profile of a reeling nip in a reeler, in which the reeling nip is arranged by means of a reeling core or a growing machine reel and at least one loop of an endless supporting member continuous in the direction of the axis of the reeling core. To control the cross-directional nip profile of the reeling nip, variables proportional to the tension of the supporting member are measured, cross-directional tension profile of the supporting member is determined on the basis of said variables, and further, a cross-directional nip profile of the reeling nip is determined, said nip profile being controlled by adjusting the determined cross-directional tension profile of the supporting member.

Method and an apparatus for controlling a nip profile of a reeling nip

A method and a system to control a reeling profile of a material web reel (), when, in the forming of a material web reel (), a web is reeled around a reeling core and when in an adjustment of CD-directional profiles of the web reel, profiling devices () have been applied. For adjusting quality profiles and reeling profiles of the web, profiling devices are managed with the help of profile measurings of the roller nip and/or of the profile measurings of the reel (), which are obtained from the reel-up (). A measuring device () for a measuring of a CD-directional hardness profile of the fiber web reel includes a measuring head (), which is connected with a loading means (), which loads the measuring head against the fiber web reel. The motion course of the measuring head is linear.

Reeling method and system as well as an measuring apparatus

In a reel change in the reeling process of a fiber material web, the fiber material web (W) running to a reel that is becoming full is changed to run around a new reeling core () brought to a reel change position in such a way that the web is made to adhere onto the surface of the new reeling core (). The web (W) is made to adhere onto the surface of the reeling core () by a change in the properties of the material on the surface of the reeling core (). The material is a combination of an adhesive area () on the surface of the reeling core and a protective layer () on top of the adhesive area, and the properties of the material are changed by removing the protective layer ().

Method for changing a reel in a reeling process of a fiber material web and a reel change apparatus

A method for measuring a nip pressure and/or a pressure profile is provided, wherein a nip-forming roll is fitted with a pressure sensor under a coating layer which is protective and functions as a spring on top of the sensor, and the nip pressure delivers to the bottom surface of the coating a deformation proportional to the nip pressure and the deformation compresses the sensor, which responds to the deformation by generating an electric signal.

On-line measurement for a pressure profile

In a method and an apparatus for controlling reeling used in connection with the making of paper/board/some equivalent web-like material, a reeler is used in the reeling which has a reeling element (), a reeling core (T), around which the web (W) is reeled to form a reel (), as well as elements for loading the reeling core (T) and the reeling element () against each other in order to bring about a reeling nip (N) in between the reeling element () and the reel (). The reeling is monitored by a detection apparatus, which automatically detects any events differing from normal reeling.

Method and apparatus for reeling control having an electromagnetic radiation detection

A method and a roll for measuring a tension profile is provided. The roll has planted on its surface a spirally helical pressure-sensitive film sensor, such as an EMFi pressure-sensitive film sensor, which makes contact with a web obliquely and which, co-directionally with the web, has a measuring range which is substantially equal to or shorter than a web overlap angle when the roll is used for measuring a lateral tension profile of the web.

Web tension profile measuring method and roll applying the same

In paper and board machines the position of a rolling device relative to another rolling device and/or the force exerted by the rolling device on the other rolling device or any variable acting on these is measured, and the value of the measured variable is compared with the set value of said variable in order to obtain the difference value of the variable, and the position of the rolling device and/or the force it exerts on the other rolling device is controlled on the basis of the difference value. The fluid pressure of the hydraulic means () and/or the flow velocity of the fluid to the hydraulic means is changed in order to alter the difference value of the variable by opening and/or closing at least one digital valve in a digital valve pack () functionally connected to the hydraulic means (S).

Method and an arrangement for controlling position and/or force of an elongated rolling device

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