Abstract: A device for processing high-consistency fibrous material has a housing. First and second treatment tools in the housing are fastened to a base plate, have a rotationally symmetrical form, are arranged coaxially to each other, rotate relative to one another about a common axis and delimit a treatment gap through which the fibrous material radially flows. The gap width of the gap is varied by axially shifting at least one base plate of a treatment tool. In order to determine the minimum distance between the base plates, the oscillations are detected on the device and the distance between the base plates rotating relative to one another is reduced until the frequency and/or the amplitude and/or the change in frequency and/or the change in amplitude of the oscillations exceeds a limit value. The distance when the limit value is exceeded is determined as the minimum distance.

Abstract: A method for producing a web of fibrous material includes the steps of: (a) low-water processing of cellulose-containing fibers into individual fibers and/or fiber bundles; (b) forming of the individual fibers and/or the fiber bundles in an air stream into a planar laid fibrous structure using a dry forming method; (c) moistening the individual fibers and/or the fiber bundles by way of a fluid; (d) solidifying the planar laid fibrous structure by applying pressure in a press nip; and (e) heating the individual fibers and/or the fiber bundles upstream from the step of solidifying (d) so as to increase a temperature of the individual fibers and/or the fiber bundles in the step of solidifying (d).

Abstract: A hydraulic machine of the Francis-type includes: an impeller with blades; a guide vane assembly with a ring of guide vanes, a vane-free space extending between the impeller and the guide vane assembly; and at least three resonators for suppressing pressure fluctuations, the resonators respectively including a chamber and a tube connector, the tube connector being connected to the chamber, the tube connector including an end that faces away from the chamber and that opens into the vane-free space, the resonators being configured for suppressing the pressure fluctuations occurring during the operation of the hydraulic machine, the resonators being arranged at a uniform distance from each other in a circumferential direction around the impeller, and the resonators being adjusted to a resonant frequency which is one and the same relative to one another.

Abstract: A pulper for circulating a fibrous stock suspension. The pulper includes at least one screen, having a screen surface which is provided with screen openings, and over which a rotor passes. The rotor is formed by a rotor head, to which a plurality of rotor blades are attached on the outer circumference. The rotor circle of the screen, which is passed over by the rotor wings, includes a plurality of bar-shaped elevations. In the process, pulping is to be improved, while wear is to be minimized, in that the angle of intersection between the working edge of the rotor blades pointing in the direction of rotation and the shear edge of the elevations pointing counter to the direction of rotation does not decrease radially outwardly.

Abstract: A roll arrangement for producing a web of fibrous material which is compressed includes: a compression press, which includes at least one compression roll and a mating roll and is configured for compressing the web in a transverse direction which is transverse to a conveying direction of the web; and a tensioning belt, which is elastic and is configured for supporting the web and for being guided through a first nip between the at least one compression roll and the mating roll and over the at least one compression roll.

Abstract: A method for producing an air-laid product or a non-woven product from a starting material includes: comminuting starting material into a comminuted material in at least one comminution line by at least one comminuting device; feeding the comminuted material into at least one material buffer; removing the comminuted material from the at least one material buffer; metering the comminuted material by at least one metering device; supplying the comminuted material to at least one processing line with at least one defibration system in which the comminuted material is defiberized into a defiberized material; and feeding the defiberized material into a production machine and processing the defiberized material into an air-laid product or a non-woven fabric. The at least one metering device is controlled in such a way that a continuous mass flow of defiberized material is supplied to the production machine.

Abstract: A method for the state-based maintenance of a coupling arrangement of a track-bound vehicle includes the steps of: providing coupling arrangement data and surroundings data; transmitting the coupling arrangement data and/or the surroundings data to a data processing system and determining a target specification for a maintenance requirement of the coupling arrangement as a function of the coupling arrangement data and the surroundings data; recording images of the coupling arrangement for optical reproduction of an actual state and transmission to the data processing system; and evaluating an optical actual state of the coupling arrangement from the images taking account of the target specification, which is formed from the operating data and the state data, for the maintenance requirement at an evaluation time and taking the evaluating as a basis for correcting the target specification.

Abstract: A method for producing a web of fibrous material, the method including the steps of: forming the web by a dry-laying process; pressing and consolidating the web in a press nip while the web lies between a first support element and a second support element, a contact surface of the first support element and a contact surface of the second support element respectively facing the web; forming at least one low-pressure zone and at least one high-pressure zone in the web by way of the contact surface of the first support element; and exerting upon the web in the at least one high-pressure zone a pressure of more than 10 MPa.

Abstract: A method and an apparatus for adjusting a suction roll. The method includes: recording images and/or videos of the exterior of the roll and transmitting the recording to a computing unit; determining the actual values of the position of the sealing strips and/or edge deckles and/or other, non-visible components by the computing unit through image analysis of the image and/or video recording of the exterior of the roll and/or by acquiring values from an embedded sensor system; and displaying the determined actual values by superimposing the position of the non-visible components on a display with the image and/or video recording.

Abstract: A hydrodynamic sliding bearing, including: a housing shell including an inner surface which forms a bearing surface configured for a rotating shaft having a radius, the housing shell including a center point, the bearing surface including at least two surface sections which are arranged one behind the other in a circumferential direction of the bearing shell, the at least two surface sections including at least one first surface section and at least one second surface section, the at least one second surface section forming a load segment, the at least one first surface section forming a non-load segment, the at least two surface sections each configured for being inscribed thereinto in an axial section with a respective circle, the respective circle of each of the at least two surface sections each having a radius that is larger than the radius of the rotating shaft and each having a center point each of which exhibits a respective eccentricity relative to the center point of the housing shell, the eccentric

Abstract: A basic structure of a clothing for a machine for producing or processing a fibrous web, in particular a paper, cardboard or tissue web. The basic structure has at least a first flat fabric of fabric type A and a second flat fabric of fabric type B, and, furthermore, two loop elements. The loop elements are formed in each case from a flat fabric piece which has a first portion of fabric type A and a second portion of fabric type B. The first portion is laid down on the second portion in such a way that the folding point is formed at a spacing of less than 5 cm, in particular less than 1 cm, from the changeover position between the fabric type A and the fabric type B. The first and the second flat fabric are arranged above one another, and the two loop elements are arranged in each case at a face-side, front end.

Abstract: A process for the production or treatment of a fibrous web, in particular a paper or cardboard web, includes the following steps: a. drying of the fibrous web in a dryer section; b. subsequent cooling of at least one first side of the fibrous web by way of convection cooling, whereby the fibrous web has a temperature of 65° C. or less on at least the first side after cooling, in particular 50° C. and less; c. apply steam to at least the first side of the fibrous web, in particular the temperature on the first side after steam application is at least 70° C., optionally more than 80° C. or 90° C.; and d. treatment of the fibrous web in at least one calendering nip.

Abstract: A bearing assembly includes: a shaft; a housing; a support structure; at least one first seal; at least one electrode connected to the support structure and arranged between the support structure and the shaft such that an oil vapor from the oil bath, which passes through the at least one first seal, must pass through a gap between the at least one electrode and the shaft in order to escape, the bearing assembly being configured for an electrical voltage to be applied between the at least one electrode and the shaft so as to direct oil particles contained in the oil vapor onto the at least one electrode such that the oil particles are separated at the at least one electrode; and a drainage channel configured for enabling oil separated at the at least one electrode to flow through the drainage channel into the oil bath.

Abstract: A method for determining the dryness of a fibrous web, in particular a tissue web, during the production of the fibrous web, is carried out in a machine including a drying cylinder, in particular a Yankee cylinder, to which at least one, preferably two, dryer hoods are assigned, and a reel-up for winding up the fibrous web. The determination of the dryness of the fibrous web is carried out before the drying cylinder on the basis of measured values which describe the following variables: the amount of solids in the fiber web at the reel-up, the amount of water in the fiber web at the reel-up, and the amount of water which is evaporated in the dryer hood or hoods. A method for controlling or regulating a machine for producing a fibrous web, a computer program and computer program product are also provided.

Abstract: A roll cover and a roll in particular for use in a machine line for the production or processing of a fibrous web is provided, wherein the roll cover includes a radial outer functional layer which provides the surface of the roll cover in contact with the web, and wherein the functional layer has structural elements, in particular in the form of grooves and/or bores, wherein the functional layer is constructed of an elastomer material with a Poisson number greater than 0.4, between 0.45 and 0.5.

Abstract: A fabric, in particular a felt, for use in a machine for producing a tissue web, has a base structure, which has a textile structure with MD threads, and at least one layer of nonwoven fibers. The MD threads predominantly or as a whole have a diameter ranging between 0.25 mm and 0.45 mm, in particular between 0.3 mm and 0.35 mm, and the thread density of the MD threads is more than 37%, in particular between 37% and 45%. There is also described a machine and a method for producing a tissue web using such a fabric.

Abstract: A roll cover and a roll in particular for use in a machine line for the production or processing of a fibrous web is provided, wherein the roll cover includes a radial outer functional layer which provides the surface of the roll cover in contact with the web, and wherein the functional layer has structural elements, in particular in the form of grooves and/or bores, wherein the functional layer is constructed of an elastomer material with a Poisson number greater than 0.4, between 0.45 and 0.5.

Abstract: A screen sorting device for cleaning a fibrous stock suspension includes: an inlet for the fibrous stock suspension; a first sorting stage, which includes a first accepts discharge; at least one second sorting stage, which includes a second accepts discharge; and a fill level detection way, which is configured for detecting an accumulation height in the at least one second sorting stage and is assigned to the at least one second sorting stage.

Abstract: A battery power plant includes: battery modules of the Redox Flow type, battery strings, and a cooling system, wherein all battery modules are connected to the flow and return of the cooling circuit such that the cooling circuit forms a parallel connection of all the battery modules, the cooling system including at least one three-way valve for controlling a volume flow of the cooling fluid flowing through the cooling device, the cooling system for each of the battery modules including at least one first valve for controlling a volume flow of the cooling fluid flowing through the heat exchanger of an associated battery module, and the cooling system including a control device for processing values measured by the first temperature sensor and the second temperature sensor and for controlling settings of the first valve and the three-way valve in order to improve the efficiency of the battery power plant.