EP2516739A1 - Dispositif et procédé pour contrôler un dispositif de compression - Google Patents

Dispositif et procédé pour contrôler un dispositif de compression

Info

Publication number
EP2516739A1
EP2516739A1 EP10793208A EP10793208A EP2516739A1 EP 2516739 A1 EP2516739 A1 EP 2516739A1 EP 10793208 A EP10793208 A EP 10793208A EP 10793208 A EP10793208 A EP 10793208A EP 2516739 A1 EP2516739 A1 EP 2516739A1
Authority
EP
European Patent Office
Prior art keywords
oil
press
lubricating device
abrasion
oil lubricating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10793208A
Other languages
German (de)
English (en)
Inventor
Wolfgang Klotzbücher
Hartmut Faber
Tobias Hafner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2516739A1 publication Critical patent/EP2516739A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G5/00—Safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N29/00—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems

Definitions

  • the invention relates to a device for monitoring a pressing device, such as a shoe press or a smoothing roll, with a flexible press cover, for treating a paper, cardboard or other fibrous web in a machine for producing and / or refining thereof.
  • a method for monitoring a pressing device relates to a method for monitoring a pressing device.
  • a flexible roll shell or press shell rotates during operation between a pressure shoe, which has a concave pressing surface to form an extended press or nip, and a counter-pressure element, for example a cylindrical counter-roll. At least the material web is in operation between the counter-roller and the press cover.
  • the lubrication of the gap between the press cover and the pressure shoe is usually hydrodynamic and / or hydrostatic with a suitable oil.
  • the required flow rate can be up to 4000 l / min, which requires an oil reserve of about 25,000 l - 30,000 l in the oil circuit, which is kept in a catch tank.
  • the press jacket and the improvement of the lubricating device it has not been possible to prevent damage and abrasion on the press cover. Abrasion and larger fragments are flushed with the oil flow in a collecting container and settle there because of their higher specific gravity, so that they are not sucked back directly from the oil circuit pump and it comes to a lubricating film break. Due to the size of the collection container, the amount of larger fragments that would have to be recorded to monitor the press cover, can be determined only very poorly. In addition, the container can be cleaned only bad.
  • the invention is therefore based on the object, an oil lubrication device and a method to propose the / that allows reliable monitoring of the press jacket.
  • the oil lubricating device for a shoe press of a web-processing machine in particular a machine for producing paper, cardboard or tissue from an oil supply, for supplying an oil flow into the contact gap between an inner race surface of a press jacket and a contact surface of a press shoe, a settling tank and a hydraulic unit to generate the required oil pressure.
  • an element for monitoring the press jacket is provided in the oil lubricating device, with which the degree of abrasion on the inner surface of the press cover can be determined.
  • the proposed element is preferably a collecting container with which the abrasion is collected and collected, so can be determined in a simple manner, the amount of abrasion, for example by regular monitoring through a viewing window.
  • the preferred collection container consists of an inlet space and an outlet space, which are functionally separated from each other.
  • a filter can be arranged between the inlet space and the outlet space to absorb the abrasion.
  • the filter is preferably designed so that it only catches the relatively large abrasion parts, since experience shows that only major disturbances occur when large parts detach from the press cover.
  • the filter has passage openings or a mesh width of 0.5 to 20 mm, preferably 2-10 mm.
  • a level sensor arranged so that the backwater level can be monitored. This can be done for example by means of an ultrasonic sensor, as it is used in the prior art for level monitoring.
  • the inlet into the inlet space is designed so that the oil flow from the inlet passes into a guide channel, which calms the flow of oil.
  • the degree of abrasion on the inner surface of the press jacket is determined by means of an element provided in the oil lubricating device.
  • the abrasion is preferably collected in a collecting container by means of a filter which clogs with increasing abrasion and causes a reduction of the flow.
  • the degree of abrasion is determined by measuring the backwater level of the oil, for example by means of an ultrasonic sensor.
  • Figure 1 shows a section of a shoe press in section to illustrate the press shoe of the press jacket and the counter-roller Figure 2 shows a device according to the invention
  • FIG. 1 shows a section of a shoe press 6 in section to illustrate the press shoe 3, the press cover 5 and the counter roll 4th
  • the flexible press cover 5 consists of fiber-reinforced plastic, which is pressed by a press shoe 2 to a cylindrical counter-roller 4. Since the press shoe 3 has a concave pressing surface facing the counter roller 4, the press cover 5 is adapted to the contour of the counter roller 9.
  • one or more dewatering belts are preferably guided in the form of press felts for receiving the water pressed out in the press nip.
  • the oil 20 is introduced via the oil supply into the contact gap 8 between the inner race 9 of the press jacket 5 and the contact surface 10 of a press shoe 3, so that an optimal lubricating film is formed.
  • the oil is collected behind the press shoe and returned to the oil circuit.
  • FIG. 2 shows a corresponding collecting container which makes it possible to monitor the press cover.
  • the return oil coming from the press (s) flows via the inlet 12 into the inlet space 14 and from there through the filter 17 into the outlet space 15, which is connected to the settling tank 11.
  • sedimentation tank 1 In sedimentation tank 1 1 smallest particles (abrasion 7), which are not filtered out by the filter, settle.
  • the oil is pumped by means of a hydraulic unit to generate the required oil pressure to the oil supply and introduced through this into the contact gap 8 between the inner race 9 of the press jacket 5 and the contact surface 10 of a press shoe 3.
  • the filter 17 in the collecting container 13 there is a separation of the oil 20 from the abrasion 7, wherein the filter 17 has relatively large passages and the free Flow area is selected so that a backwater is formed as soon as there is too much abrasion 7 in the filter 17.
  • a correspondingly installed level sensor 19 in the inlet space 14 monitors the level. If the level is too high, this is a clear indication of too much abrasion 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un dispositif de graissage à l'huile (1) pour une presse à sabot (6) d'une machine traitant des bandes, en particulier d'une machine pour fabriquer du papier, du carton ou du papier de soie, comprenant un dispositif d'alimentation d'huile (7) pour l'arrivée d'un flux d'huile dans la fente de contact (8) de la surface de roulement intérieure (9) d'une enveloppe de compression (5) et de la surface de contact (10) d'un sabot de compression, un bassin de décantation (11) et une unité hydraulique (12) pour générer la pression d'huile nécessaire, un élément étant prévu dans le dispositif de graissage à l'huile (1) pour le contrôle de l'enveloppe de compression (5), avec lequel le degré d'usure sur la surface intérieure de l'enveloppe de compression (5) peut être déterminé.
EP10793208A 2009-12-23 2010-12-09 Dispositif et procédé pour contrôler un dispositif de compression Withdrawn EP2516739A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009055248A DE102009055248A1 (de) 2009-12-23 2009-12-23 Vorrichtung und Verfahren zum Überwachen einer Pressvorrichtung
PCT/EP2010/069233 WO2011076575A1 (fr) 2009-12-23 2010-12-09 Dispositif et procédé pour contrôler un dispositif de compression

Publications (1)

Publication Number Publication Date
EP2516739A1 true EP2516739A1 (fr) 2012-10-31

Family

ID=43618029

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10793208A Withdrawn EP2516739A1 (fr) 2009-12-23 2010-12-09 Dispositif et procédé pour contrôler un dispositif de compression

Country Status (3)

Country Link
EP (1) EP2516739A1 (fr)
DE (1) DE102009055248A1 (fr)
WO (1) WO2011076575A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012205185A1 (de) 2012-03-30 2013-10-02 Voith Patent Gmbh Pressvorrichtung für eine Maschine zur Herstellung einer Faserstoffbahn
DE102019126075A1 (de) * 2019-09-27 2021-04-01 Voith Patent Gmbh Pressmantel, dessen Verwendung sowie Schuhpresse und Maschine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10158717A1 (de) * 2001-11-29 2003-06-12 Voith Paper Patent Gmbh Presswalze
DE10325947C5 (de) * 2003-06-07 2009-11-26 Voith Patent Gmbh Verfahren zum Behandeln einer Bahn, insbesondere einer Papierbahn

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011076575A1 *

Also Published As

Publication number Publication date
DE102009055248A1 (de) 2011-06-30
WO2011076575A1 (fr) 2011-06-30

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