DE183610C - - Google Patents
Info
- Publication number
- DE183610C DE183610C DENDAT183610D DE183610DA DE183610C DE 183610 C DE183610 C DE 183610C DE NDAT183610 D DENDAT183610 D DE NDAT183610D DE 183610D A DE183610D A DE 183610DA DE 183610 C DE183610 C DE 183610C
- Authority
- DE
- Germany
- Prior art keywords
- pump
- pumps
- metal cloth
- suction box
- suction
- 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.)
- Active
Links
- 230000001105 regulatory Effects 0.000 claims description 4
- 238000006297 dehydration reaction Methods 0.000 claims 1
- 239000004744 fabric Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000002950 deficient Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/48—Suction apparatus
Landscapes
- Paper (AREA)
Description
PATENTAMTPATENT OFFICE
Die Wirkung der Saugkasten bei Papiermaschinen wird meistens dadurch geregelt, daß man in die Leitung zwischen den Saugkasten und den stets gleichmäßig arbeitenden Pumpen ein Drosselventil einschaltet, das man nach Bedarf mehr oder weniger abschließt. The effect of the suction box on paper machines is usually regulated by that one is in the line between the suction box and the always evenly working Pumps switches on a throttle valve that is more or less closed as required.
Das durch die Pumpe erzeugte Vakuum entspricht etwa 400 bis 500 mm Wassersäule, während im allgemeinen bei normal starkem Druckpapier nur ein Vakuum von 200 bis 250 mm erforderlich ist. Nur nach Einziehen eines neuen Metalltuches, bei welcher Gelegenheit auch der Holzbelag der Saugkasten abgerichtet oder erneuert wird, ist eine stärkere Wirkung der Pumpen notwendig, weil der Schluß des neuen Metalltuches auf dem' Saugkastenbelag im Anfang mangelhaft ist und daher zwischen Metalltuch und Belag Luft mit eingesaugt wird. Diesen ungünstigen Ausnahmeverhältnissen müssen die Pumpen gewachsen und somit für eine Leistung gebaut sein, die für die normalen Verhältnisse bei eingelaufenem Sieb zu groß ist.The vacuum generated by the pump corresponds to about 400 to 500 mm water column, while in general with normal thick printing paper only a vacuum of 200 to 250 mm is required. Only after pulling in a new metal cloth, which Opportunity to dress or replace the wood covering of the suction box, a stronger effect of the pumps is necessary, because the end of the new metal cloth on the 'suction box covering in the beginning is defective and therefore air is sucked in between the metal cloth and the covering. This one The pumps have to cope with unfavorable exceptional circumstances and thus for a Power must be built that is too great for the normal conditions with a run-in sieve.
Die volle Leistung der Pumpen wird bei einem neuen Metalltuch zur Geltung gebracht, indem man das Ventil in der Saugleitung vollständig öffnet. In dem Maße, wie sich das Metalltuch auf dem Saugkasten dichtet, wird das Ventil mehr und mehr geschlossen. Es wird hierbei der nicht nutzbar gemachte Überschuß der Pumpenarbeit einfach vernichtet. Dieser Arbeitsverlust ist ganz erheblich, wenn man bedenkt, daß die Zeit, die das Metalltuch braucht, um sich vollständig einzulaufen, nur etwa IO Prozent seiner gesamten Laufzeit beträgt, so daß während 90 Prozent der Laufzeit das Regelventil auf kleinste öffnung, in der eine starke Drosselung stattfindet, gestellt ist.The full performance of the pumps is shown to advantage with a new metal cloth, by fully opening the valve in the suction line. To the extent that the metal cloth seals on the suction box, the valve is closed more and more. The excess of the pump work that has not been made usable is simply destroyed. This loss of work is quite significant when you consider that the time it takes for the metal cloth to be completely to run in, is only about IO percent of its total running time, so that during 90 percent of the running time the control valve to the smallest opening, in which a strong throttling takes place.
Dieser Mangel soll nach der Erfindung dadurch beseitigt werden, daß die Regelung der Saugwirkung durch Regelung der Pumpenarbeit bewirkt wird. Zweckmäßig erhält die Pumpe ihren Antrieb durch ein Wechselgetriebe, das eine allmähliche Änderung ihrer Umlaufgeschwindigkeit gestattet. Es eignet sich hierfür z. B. das bekannte Riemenkegelgetriebe mit einem auf zwei auf parallelen Wellen entgegengesetzt angeordneten Kegeln verschiebbaren Riemen.This deficiency is to be eliminated according to the invention in that the regulation the suction effect is brought about by regulating the pump work. Appropriately receives the pump is driven by a change gear, which is a gradual change in its Circulation speed permitted. It is suitable for this z. B. the well-known belt bevel gear with a belt that can be moved on two opposing cones on parallel shafts.
Durch Anwendung der neuen Regelung wird nicht nur eine Ersparnis mechanischer Arbeit erzielt, sondern auch eine Abnutzung der Pumpen vermieden.Applying the new regulation not only makes savings more mechanical Achieved work, but also avoids wear on the pumps.
Claims (2)
Publications (1)
Publication Number | Publication Date |
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DE183610C true DE183610C (en) |
Family
ID=447608
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT183610D Active DE183610C (en) |
Country Status (1)
Country | Link |
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DE (1) | DE183610C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3222776A1 (en) * | 1981-06-19 | 1983-01-05 | Albany International Corp., 12204 Menands, N.Y. | VACUUM CONTROL SYSTEM FOR DRAINING A PAPER RAIL |
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0
- DE DENDAT183610D patent/DE183610C/de active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3222776A1 (en) * | 1981-06-19 | 1983-01-05 | Albany International Corp., 12204 Menands, N.Y. | VACUUM CONTROL SYSTEM FOR DRAINING A PAPER RAIL |
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