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DE3010829A1 - Stuffing box seal with rings of different thickness - which are subjected to equal pressure and separated by externally stepped distance bush - Google Patents

Stuffing box seal with rings of different thickness - which are subjected to equal pressure and separated by externally stepped distance bush

Info

Publication number
DE3010829A1
DE3010829A1 DE19803010829 DE3010829A DE3010829A1 DE 3010829 A1 DE3010829 A1 DE 3010829A1 DE 19803010829 DE19803010829 DE 19803010829 DE 3010829 A DE3010829 A DE 3010829A DE 3010829 A1 DE3010829 A1 DE 3010829A1
Authority
DE
Germany
Prior art keywords
stuffing box
separated
box seal
rings
packing
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.)
Ceased
Application number
DE19803010829
Other languages
German (de)
Inventor
Achim Ing.(Grad.) 3006 Burgwedel Daume
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19803010829 priority Critical patent/DE3010829A1/en
Publication of DE3010829A1 publication Critical patent/DE3010829A1/en
Ceased legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/46Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
    • F16J15/48Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings influenced by the pressure within the member to be sealed
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/16Sealings between relatively-moving surfaces
    • F16J15/18Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
    • F16J15/184Tightening mechanisms
    • F16J15/185Tightening mechanisms with continuous adjustment of the compression of the packing
    • F16J15/186Tightening mechanisms with continuous adjustment of the compression of the packing using springs

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Architecture (AREA)
  • Fluid Mechanics (AREA)
  • Sealing Devices (AREA)

Abstract

The stuffing box seal assembly is intended for a rotating or reciprocating shaft (14), or the like, to seal against high-pressure and/or temp. liquid or gas. It comprises a housing (11,9) with a packing chamber containing packing rings (1,2), whose end faces have different surface areas. The packing consists of separate packing rings of different radial thickness which are separated by a spacer bush (3) with stepped outer diameter. The housing may contain an annular groove at the level of this step, and a pressure relief duct (10) connecting to this groove.

Description

Stopfbuchsdichtung Stuffing box seal

Die Erfindung betrifft eine wartungsfreie Stopfbucdichtung für Wellen und bewegte Stangen zur Dichtung gegen unter hohen Drücken und/oder Temperaturen stehende Flüssigkeiten und Gase, bei welcher der die Dichtpackung aufnehmende Packungsraum mit unterschiedlich großen Stirnflächen ausgeführt ist, nach Patent (Patentanmeldung P 28 16 930.4).The invention relates to a maintenance-free gland seal for shafts and moving rods for sealing against high pressures and / or temperatures standing liquids and gases, in which the packing space accommodating the packing is designed with differently sized end faces, according to patent (patent application P 28 16 930.4).

Der Erfindung nach dem Hauptpatent (Hauptanmeldung) liegt die Aufgabe zugrunde, eine Dichtung so zu gestalten, daß deren Dichtwirkung auch bei Höchsttemperatur-und Druckansprüchen sichergestellt ist und gleichzeitig die Wartungsfreiheit erheblich erhöht wird. Mit dem vorliegenden Erfindungsgegenstand soll darüberhinaus die Herstellung einer solchen Dichtung vereinfacht werden. Dies geschieht erfindungsgemäß dadurch, daß zwei Dichtpackungen unterschiedlicher Stärke vorgesehen sind, die durch ein Distanzstück mit einer abgesetzten Außenmantelfläche voneinander getrennt sind.The invention according to the main patent (main application) is the task based on designing a seal so that its sealing effect even at maximum temperature and Printing requirements is ensured and at the same time the freedom from maintenance is considerable is increased. With the present subject matter of the invention, the production such a seal can be simplified. According to the invention, this is done by that two packings of different strengths are provided by a Spacer with a stepped outer jacket surface are separated from each other.

Hierdurch wird die Herstellung wesentlich vereinfacht, da einfache zylindrische Dichtpackungen verwendet werden können, die sich lediglich in ihrem Außendurchmesser unterscheiden.This considerably simplifies the production because it is simple cylindrical sealing packings can be used, which are only in their outer diameter differentiate.

Um zu vermeiden, daß der an den Stirnseiten herrschende Druck an der Außenmantelfläche entlang allmählich bis zum Absatz des Distanzstücks durchdringt und dadurch zu einem Kraftausgleich führt, kann im Gehäuse im Bereich des Distanzstückabsatzes eine Ringnut angeordnet sein, von der eine Druckentlastungsbohrung ausgehend das Gehäuse durchsetzt und dadurch in diesem Bereich keinen tiohern ci i S den Umget)un(g5druck zuläßt. Bei guten Dichtung bzw. weniger hohen Drücken kann evtl. auf eine Entlastungsbohrung verzichtet werden, ohne daß die gewünschte Kraftresultierende auf Null zurückgeht.In order to avoid that the pressure prevailing at the end faces on the Outer jacket surface gradually penetrates along to the shoulder of the spacer and thereby leads to a force balance, can in the housing in the area of the spacer shoulder be arranged an annular groove from which a pressure relief hole starting the Housing penetrated and therefore no tiohern ci i S den Umget) un (g5druck) in this area allows. If the seal is good or the pressures are not as high, there may be a relief hole can be dispensed with without the desired resultant force going back to zero.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung schematisch dargestellt und nachstehend erläutert.An exemplary embodiment of the invention is shown schematically in the drawing shown and explained below.

Im einzelnen bedeuten: 1 die Dichtpackung mit dem größeren Außendurchmesser 2 die Dichtpackung mit dem kleineren Außendurchmesser 3 das Distanzstück 4 den Stopfbuchsenring mit dem größeren Außendurchmesser 5 den Stopfbuchsring mit dem kleineren Außendurchmesser 6 einen Druckausgleichskanal 7 eine Bewegungsstange 8 ein Federelement 9 das Oberteil des Armaturengehäuses 10 die Entlastungsbohrung mit der Ringnut 11 das Unterteil des Armaturengehäuses 12 eine Drosselkante 13 Druckraum oberhalb des Ventilkolbens 14 den Ventilkolben 15 den Abströmraum Der Ventilkörper 14 ist in Axialrichtung durch die Bewegungsstange 7 verstellbar. Die Ausgleichsbohrung 6 sorgt dafür, daß im Druckraum 13 der yb iche Druck ilerrscht wie ciuf dc'r Einströmseite ti d>s Ventils und dadurch bereits im geschlossenen Zustand ein nahezu vollkommen-er Kraftausgleich für den Ventilkörper erreicht wird. Die aufzuwendende Stellkraft wird dadurch auf ein Minimum begrenzt. Der Druck PE wirkt also sowohl auf die Oberseite des grö3eren Stopfbuchsringes 4 als auch auf die Unterseite des kleineren Stopfbuchsringes 5.In detail: 1 the packing with the larger outer diameter 2 the packing with the smaller outer diameter 3 the spacer 4 the gland ring with the larger outer diameter 5, the gland ring with the smaller outer diameter 6 a pressure equalization channel 7 a movement rod 8 a spring element 9 the upper part of the valve body 10 the relief bore with the annular groove 11 the lower part of the valve housing 12 a throttle edge 13 pressure chamber above of the valve piston 14 the valve piston 15 the outflow space The valve body 14 is adjustable in the axial direction by the movement rod 7. The compensation hole 6 ensures that the pressure in the pressure chamber 13 is the same as on the inflow side ti d> s valve and therefore an almost perfect-er even when closed Force compensation for the valve body is achieved. The force to be used is thereby limited to a minimum. The pressure PE therefore acts on both the top side of the larger stuffing box ring 4 as well as on the underside of the smaller stuffing box ring 5.

Entsprechend werden die Stopfbuchsdichtungen 1 und 2 belastet. Durch die Flächendifferenz ergibt sich eine nach unten resultierende Kraftkomponente, die dafür sorgt, daß die Stopfbuchsen ständig zur Erzeugung einer genügenden Dichtung belastet werden.The stuffing box seals 1 and 2 are loaded accordingly. By the area difference results in a downward force component, which ensures that the stuffing boxes are constantly producing a sufficient seal are charged.

Um zu vermeiden, daß sich die Drücke durch Leckage allmählich an den Außenseiten der Dichtungen entlang weiter fortsetzen bis der absatzförmige Bereich des Distanzstücks 3 erreicht ist, was zu einem Kraftausgleich führen würde, ist eine Entlastungsbohrung 10 vorgesehen, welche dafür sorgt, daß der Absatzbereich mit keinem höheren Druck als dem Umgehungsdruck belastet wird. Dadurch ist sichergestellt, daß auch bei den höchsten Drücken die Wartungsfreiheit der Dichtung gewahrt bleibt.In order to prevent the pressures from gradually increasing due to leakage Continue along the outside of the seals until the stepped area of the spacer 3 is reached, which would lead to a force balance is a relief hole 10 is provided, which ensures that the heel area is not loaded with a pressure higher than the bypass pressure. This ensures that the maintenance-free seal is maintained even at the highest pressures.

Die Herstellung zylindrischer Dichtpackungen und Pakkungsringe ist jedoch erheblich einfacher als die Fertigung von konisch verlaufenden Packungen und Packungssitzen.The manufacture of cylindrical packing rings and packing rings is however, it is considerably easier than the production of tapered packs and pack seats.

- Patentansprüche - Leerseite- patent claims - Blank page

Claims (2)

Patentansprüche 1.) Wartungsarme Stopfbuchsdichtung für Wellen und bewegte Stangen zur Abdichtung gegen unter hohen Drükken und/oder Temperaturen stehende Flüssigkeiten und Gase, bei welcher der die Dichtpackung aufnehmende Packunysraum mit unterschiedlich großen Stirnflächen ausgef'i,ihrt, ist, gekennzeichnet durch Dichtpackunv gen (1, 2) unterschiedlicher Stärke, die durch ein Distanzst,iick (3) mit einer abgesetzten Außenmantelfläche voneinander getrennt sind. Claims 1.) Low-maintenance stuffing box seal for shafts and moving rods for sealing against standing under high pressures and / or temperatures Liquids and gases, in which the packing space accommodating the packing designed with differently sized end faces, is characterized by Sealing packings (1, 2) of different thicknesses, which are separated by a spacer (3) are separated from each other by a stepped outer jacket surface. 2.) Stopfbuchsdichtung nach Anspruch 1, dadurch gekennzeichnet, daß im Bereich des Distanzstückabsatzes im Gehäuse (11) eine Ringnut und eine von dieser ausgehende Druckentlastungsbohrung (10) angeordnet ist.2.) Stuffing box seal according to claim 1, characterized in that an annular groove and one of these in the area of the spacer shoulder in the housing (11) outgoing pressure relief bore (10) is arranged.
DE19803010829 1980-03-21 1980-03-21 Stuffing box seal with rings of different thickness - which are subjected to equal pressure and separated by externally stepped distance bush Ceased DE3010829A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803010829 DE3010829A1 (en) 1980-03-21 1980-03-21 Stuffing box seal with rings of different thickness - which are subjected to equal pressure and separated by externally stepped distance bush

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803010829 DE3010829A1 (en) 1980-03-21 1980-03-21 Stuffing box seal with rings of different thickness - which are subjected to equal pressure and separated by externally stepped distance bush

Publications (1)

Publication Number Publication Date
DE3010829A1 true DE3010829A1 (en) 1981-10-01

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Family Applications (1)

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DE19803010829 Ceased DE3010829A1 (en) 1980-03-21 1980-03-21 Stuffing box seal with rings of different thickness - which are subjected to equal pressure and separated by externally stepped distance bush

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DE (1) DE3010829A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3534135A1 (en) * 1985-09-25 1987-04-02 Hp & Hp Chemie Stellglieder SEALING DEVICE ON A PISTON-CYLINDER ARRANGEMENT, IN PARTICULAR TO SEAL THE VALVE CONE ON VALVES WITH PRESSURE COMPENSATION
US4890542A (en) * 1988-09-06 1990-01-02 Ingersoll-Rand Company High-pressure-fluid machine, a seal
US4965409A (en) * 1988-10-10 1990-10-23 Flygt Ab Cable entry connection of an electric power cable to a submersible machine
USRE34367E (en) * 1988-09-06 1993-09-07 Dresser-Rand Company High-pressure-fluid machine, a seal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1020095A (en) * 1950-06-13 1953-02-02 Progressive tightening cable gland with packing extractor
DE2816930A1 (en) * 1978-04-19 1979-10-31 Daume Achim Ing Grad Stuffing box seal for reciprocated shaft - has graphite rings compressed axially by spring washers into conical outer housing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1020095A (en) * 1950-06-13 1953-02-02 Progressive tightening cable gland with packing extractor
DE2816930A1 (en) * 1978-04-19 1979-10-31 Daume Achim Ing Grad Stuffing box seal for reciprocated shaft - has graphite rings compressed axially by spring washers into conical outer housing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE-AN G7904/47f15/20 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3534135A1 (en) * 1985-09-25 1987-04-02 Hp & Hp Chemie Stellglieder SEALING DEVICE ON A PISTON-CYLINDER ARRANGEMENT, IN PARTICULAR TO SEAL THE VALVE CONE ON VALVES WITH PRESSURE COMPENSATION
US4722507A (en) * 1985-09-25 1988-02-02 Masoneilan International, Inc. Piston sealing ring apparatus
US4890542A (en) * 1988-09-06 1990-01-02 Ingersoll-Rand Company High-pressure-fluid machine, a seal
USRE34367E (en) * 1988-09-06 1993-09-07 Dresser-Rand Company High-pressure-fluid machine, a seal
US4965409A (en) * 1988-10-10 1990-10-23 Flygt Ab Cable entry connection of an electric power cable to a submersible machine

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