DE1070461B

DE1070461B -

Info

Publication number: DE1070461B
Application number: DENDAT1070461D
Authority: DE

Description

Stopfbüchsenpackungen bestehen aus elastischen oder plastischen Elementen, die sich beim Zusammenpressen abdichtend an die Wellen und Gehäuseflächen legen. Für besondere Zweckt, insbesondere in der chemischen Industrie, hat man häufig Stopfbüchsen aus Kohle und/oder Graphit verwendet, die abwechselnd aus einzelnen planparallelen Ringtn aus Hartkohle und au» weichem Graphit bestehen. Der weiche Graphit hat zwar keine Elastizität oder Plastizität im üblichen Sinne, aber er läßt sich unter hohem Druck um geringes deformieren und damit gewissermaßen i]uetsclien, wodurch eine Abdichtung erfolgt. Diese .Manipulation erfordert starke Drücke und ist nicht immer sicher in der Abdichtung, da die von der Stopfbüchsenbrille ausgeübten Preßdrücke axial auf die Ringe wirken und nur der durch die Materialverdrängung entstehende Druck radial auf die Dichtungsflächen auftrifft.Stuffing box packings consist of elastic or plastic elements which, when pressed together, seal against the shafts and housing surfaces. For special purposes, especially in the chemical industry, stuffing boxes made of carbon and / or graphite have often been used, which consist alternately of individual plane-parallel rings made of hard carbon and soft graphite. The soft graphite has indeed no elasticity or plasticity in the usual sense, but it can be under high pressure to low and deform to a certain extent i] uetsclien, thereby effecting a seal. This .Manipulation requires strong pressures and is not always secure in the seal, since the pressure exerted by the gland follower act axially on the rings and only the pressure generated by the displacement of the material strikes the sealing surfaces radially.

Es sind Packungen bekannt, l>ei denen die Packungsriemente aus Gummi oder anderem leicht verformbarem elastischem Material so geformt sind, daß sie durch die im Querschnitt dachförmige Ausbildung der oberen und unteren Gegenflächen auseinandergespreizt und an die abzudichtenden Flächen augepreßt werden.Packs are known in which the packing straps are made of rubber or other easily deformable material elastic material are shaped so that they through the cross-section roof-shaped design of the the upper and lower mating surfaces are spread apart and pressed against the surfaces to be sealed.

Auch sind schon metallene Dichtungspackungen bekanntgeworden, bei denen weichere .Metallringe durch härtere Metallringe auseinandergequetscht werden. Die weicheren Metallringe haben zu diesem Zweck wenigstens an einer Stirnseite eine im Querschnitt keilförmige Rinne, in die Keilringe aus härterem Metall mit eckigem oder fast rundem Querschnitt eingedrückt werden. Auch hier erfolgt eine Deformation der weicheren .Metallringe.Metal packing packings have also become known in which softer .Metallringe be squeezed apart by harder metal rings. The softer metal rings have to do with this Purpose, at least on one end face, a channel with a wedge-shaped cross-section, into which the wedge rings are made of harder material Metal with an angular or almost round cross-section can be pressed in. Here, too, one takes place Deformation of the softer metal rings.

Des weiteren sind Dichtungen für Wellen. Stangen u. dgl. bekannt, die aus metallischen Manschetteriringen U- oder V-förmigen Querschnitts bestehen, auf deren freie Schenkelenden je ein metallischer Druckring wirkt. Hier erfolgt ebenfalls eine starke Deformation der Weichmetall ringe.There are also seals for shafts. Rods and the like are known which consist of metallic collar rings of U- or V- shaped cross-section, on the free leg ends of which a metallic pressure ring acts. The soft metal rings are also severely deformed here.

Es sind auch Stopfbüchsenpackungeii mit mehreren hintereinanderliegenden Packungsringen aus Graphit. Kohle oder «ähnlichen Stoffen mit Bindemitteln aus harzartigen Umsetzungsprodukten bekannt, die auf Ier Innenseite abgeschrägte Ausnehmungen zur Aufnahme von plastisch verformbaren Iiinlageringen aus Blau-Asbest aufweisen. Die Abdichtung erfolgt hier durch Deformation der Asbestringe beim Anziehen Ier Stopfbüchse.There are also stuffing box packings with several graphite packing rings one behind the other. Coal or «similar substances with binders known from resinous reaction products that are based on On the inside beveled recesses for receiving plastically deformable Iiinlagerings Blue asbestos. The sealing takes place here by deformation of the asbestos rings when tightening Ier stuffing box.

Ähnlich verhalten sich selbstdichtende Metallstopfbüchsen mit an der Kolbenstange und an dem Stopfbüchsenhals mittels zwischen sie eingefügter Keilringe anzupressenden Packungsringen. Sämtliche hier verwendeten Metallringe sind einteilig, geschlitzt und federnd. ZumZwecke der Abdichtung wird ein axialer Stopfbüchsenpackung
aus Kohle- oder GraphitringenSelf-sealing metal stuffing boxes behave similarly with packing rings to be pressed onto the piston rod and the stuffing box neck by means of wedge rings inserted between them. All metal rings used here are one-piece, slotted and resilient. An axial gland packing is used for sealing purposes
made of carbon or graphite rings

Anmelder:
Fa. C. Conradty,
Nürnberg, Spittlertorgraben 9Applicant:
C. Conradty,
Nuremberg, Spittlertorgraben 9

Friedrich Leuchs, Röthenbach/Pegnitz,
ist als Erfinder genannt worden
Friedrich Leuchs, Röthenbach / Pegnitz,
has been named as the inventor

Druck auf die Packung ausgeübt, wobei die äußeren Packungsringe auseinandergespreizt und die inneren Packungsringe zusammengedrückt werden.Pressure is exerted on the packing, with the outer packing rings spreading apart and the inner ones Packing rings are squeezed together.

Mit einer Ausnahme handelt es sich in allen vorerwähnten Fällen also entweder um reine Metalldichtungen oder um Packungen mit metallenen Druckringen und elastischen Dichtungselementen aus anderen Werkstoffen. In jedem Falle wird die Abdichtung durch eine elastische oder plastische Deformation der Dichtungsringe erzielt. Infolgeder Materialbeschaffenheit sind die bekannten Stopfbüchsen aber nicht für den Einsatz in der chemischen Industrie geeignet, da sie gegen aggressive Säuren. Laugen u. dgl. nicht widertandsfähig sind. In diesem Falle kommt nur der Einsatz von Kohle- und Graphitringen in Frage, da diese Materialien gegen chemische Angriffe sehr widerstandsfähig sind. Nachdem nun al>er Kohle und Graphit nicht oder nur sehr wenig deformierbar sind, war es nötig, diese Eigenschaften bei ihrer Verwendung für Stopfbüchsenpackungen zu berücksichtigen.With one exception, all of the aforementioned cases are either pure metal seals or packing with metal compression rings and elastic sealing elements from others Materials. In any case, the seal is made by an elastic or plastic deformation of the Sealing rings achieved. Due to the nature of the material, the known stuffing boxes are not for suitable for use in the chemical industry as they protect against aggressive acids. Caustic solutions and the like are not are resilient. In this case, only the use of carbon and graphite rings comes into question, there these materials are very resistant to chemical attack. Now after all coal and Graphite is not or only very little deformable, it was necessary to have these properties when using it to be considered for stuffing box packings.

Gemäß der Erhndung haben die harten Kohle- oder Graphitritige der aus wechselweise aneinandergereihten Ringen aus hartem und weichem Kohle- und/oder Graphitniaterial bestehenden Stopfbüchsenpackung in an sich bekannter Weise dachförmig ausgebildete Druckflächen, durch deren Keilwirkung die entsprechend profilierten weichen Graphitringe gegen die abzudichtendeti Wellen und die Gehäusewand gepreßt werden, wobei die weichen Graphitpackungsringe aus je zwei konzentrischen, trapezförmig profilierten Ringen, deren Schmalseiten gegeneinander gerichtet sind, bestehen. Hierdurch wird nicht nur eine wesentliche Verbesserung der Abdichtung, sondern auch eine erhebliche Schonung der Stopfbüchsenpackung erreicht. Kohle und Graphit, insbesondere Elektrographit, sind gegen Druckbeanspruchungen sehr widerstandsfähig, Graphit hat dabei in seiner weichen Modihkation nochAccording to the invention, the hard carbon or graphite rites have those alternately strung together Rings made of hard and soft carbon and / or graphite material in gland packing in In a known manner, roof-shaped pressure surfaces, through the wedge effect of which the corresponding profiled soft graphite rings pressed against the shafts to be sealed and the housing wall The soft graphite packing rings each consist of two concentric, trapezoidal profiled rings, whose narrow sides are directed against each other exist. This is not just an essential one Improvement of the seal, but also a considerable protection of the stuffing box packing achieved. Carbon and graphite, especially electrographite, are very resistant to pressure loads, Graphite still has its soft modification

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Claims

the property of low deformability without destruction. It has proven to be expedient, particularly in the case of larger plug-in-sleeve seals, to split the soft graphite packing rings in two or more parallel! split layered, one-piece or multi-piece rings, of which only the rings adjacent to the hard carbon rings consist of two concentric parts. In order to prevent the soft graphite packing rings from bursting under the radially outward pressure, the rings can be subdivided in the circumferential direction in a manner known per se, with the abutment surfaces of the soft graphite packing rings subdivided on the circumference being smooth, overlapping or toothed in a manner known per se. may be overlapped. To shorten their running-in time, the outer and inner sealing surfaces of the soft graphite packing rings can also have fine circumferential grooves and ridges. When compressing a gland packing, the remaining fine burrs are then deformed by the radial pressure, the grooves are filled in and the seal is quickly achieved without the rings being destroyed. The drawing shows in Fig. 1 a longitudinal section through a stuffing box with the packing rings according to the invention made of carbon or graphite, for the sake of simplicity, some of the different embodiments are combined in one packing, a is the shaft, c the housing wall, b and bi are hard carbon. or hard graphite rings with roof-shaped pressure surfaces d. In between there are correspondingly profiled soft graphite rings e, ev e2, etc., of which e and C1 are concentrically divided soft graphite rings, which in case e are still touching, in case ex are already separated from one another by a gap. et is a soft graphite ring divided into three layers in its axial direction, the middle layer of which is undivided, while the two outer layers each consist of two concentric rings. At e3, two concentric pairs of rings made of soft graphite are placed next to one another, whereby the sealing capability can be increased by offsetting any radial joints. The per se known subdivision of the circumference is indicated in FIG. 2, where Z1 is a smooth joint, f2 is an overlapped joint and f3 is a toothed joint. By the pressure piece g in Fig. 1, the gland rings are pressed together in the direction of the arrow. In Fig. 3, two examples are shown again enlarged and exploded, how the rings are arranged to one another, b and are the hard coal rings in section, the concentrically subdivided and e2 the multi-height subdivided 'soft graphite ring, which in this case for example * ■ consists of four beveled, three-part soft graphite rings 1, 2, 3, 4 according to FIG. 2 and a plane-parallel, undivided ring 5 arranged between them. The two concentric soft graphite rings (?, Have very fine grooves on the inner and outer circumference to shorten the running-in period R. Claim ε:

1. Stuffing box packing, consisting of alternately lined up rings made of hard and soft carbon and / or graphite material, characterized in that the hard carbon or Graphite rings have roof-shaped pressure surfaces in a manner known per se, through whose wedge effect the correspondingly profiled soft graphite rings against the ones to be sealed Shafts and the housing wall are pressed, the soft graphite packing rings each consisting of two concentric, trapezoidal profiled rings, the narrow sides of which are directed against each other, exist.

2. Stuffing box packing according to claim i, characterized in that the soft graphite packing rings each divided into two or more parallel, one-part or multi-part rings are, of which only the two concentric rings adjacent to the hard carbon rings Share exist.

3. Stuffing box packing according to claim 1 and 2, characterized in that the soft graphite packing rings are subdivided in their scope in a manner known per se.

4. Stuffing box packing according to claim 3, characterized in that the abutment surfaces of the Perimeter subdivided soft graphite packing rings in a known manner smooth, overlapped or are toothed-overlapped.

5. gland packing according to claim 1 to 4, characterized in that the outer and inner sealing surfaces of the soft graphite packing rings to shorten their running-in time have fine circumferential grooves.

Considered publications:
German patent specifications No. 703 803, 256 134,

988, 130 711;

Swiss Patent No. 92,474;
U.S. Patents Nos. 2,711,333, 2,706,655,

787 020;

German utility model No. 1 699 166.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

O 909 687/221 11.O 909 687/221 11.

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