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Shoe rolls, long nip presses and fiber web machines

A long nip and shoe roll technology, applied in the press section, paper machine, textile and papermaking, etc., can solve the problems of belt damage, long nip with a large part of the load, etc., to reduce the impact, improve the lateral pressure distribution, design The simple effect of the scheme

Inactive Publication Date: 2017-03-29
VALMET TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Higher bending stiffness can lead to disadvantages such as the need to compensate pressure fluctuations due to thickness fluctuations of felt or similar
This leads to: particularly high local loads on long nip belts, which can damage the belt in some cases when, for example, a paper block runs into the nip in the event of a fault

Method used

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  • Shoe rolls, long nip presses and fiber web machines
  • Shoe rolls, long nip presses and fiber web machines
  • Shoe rolls, long nip presses and fiber web machines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] exist figure 1 and figure 2 An example of the environment in which the shoe roll 11 according to the invention is used in a paper or board machine is shown in a schematic diagram in FIG. The figures show a so-called long-nip press 10 seen from the side in section.

[0022] The long-nip press 10 consists of a longitudinally extending shoe roll 11 and its counter roll 12 . The shoe roller 11 can be loaded against its associated counter roller 12 in a known manner. Here, an elongated press nip, namely the nip 13 , is formed between the rolls 11 , 12 in the machine direction, after which this type of press is named.

[0023] The sheath of the shoe roller 11 can consist of a belt loop 17 . The belt loop 17 can be fastened with its ends to a round end flange of the roller 11 (not shown in the figures). The flange can also be arranged rotatably on, for example, the intermediate shaft 36 of the roller 11 . Furthermore, belt presses are also known in which the belt can re...

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PUM

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Abstract

The roll (11) has a burden part (16) and a cladding (17) arranged in a shoe (15). The shoe is provided with a suspension arrangement (18) and springs relative to the burden part. The suspension arrangement is placed between the burden part and the shoe. A cylinder part (19) is arranged on a side of the shoe. A piston part (20) is provided on a side of the burden part. A push plate (22) is provided on the suspension arrangement and the shoe. A seal arrangement (31) and a stop construction (30) are arranged in longitudinal direction of the roll. An independent claim is also included for a fiber web machine.

Description

technical field [0001] The subject of the invention relates to a shoe roll with a sheath and a press shoe (hereinafter simply referred to as shoe) inside the sheath and containing a load device. Furthermore, the invention relates to a long nip press and a fiber web making machine. Background technique [0002] Today, in the press section of paper and board machines, a so-called long-nip press is known. The long-nip press consists of a so-called shoe roll and a counter-roll, wherein for example the shoe roll can be loaded, ie pressed, against the counter-roll. Here, a longer nip is formed between the rolls in the machine direction. The jacket part of the shoe roller is formed by a belt ring, which is fastened, for example, to the end flange of the roller in order to rotate the shoe. The shoe containing the load and support means forming the nip is located inside the belt loop. [0003] When using separate load cylinders, the shoes of the shoe press must have a high bendin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21F3/00D21F3/08
CPCD21F3/0218
Inventor 约尔马·斯内尔曼
Owner VALMET TECH OY
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