DE2711344B1 - Mechanical seal - Google Patents
Mechanical sealInfo
- Publication number
- DE2711344B1 DE2711344B1 DE19772711344 DE2711344A DE2711344B1 DE 2711344 B1 DE2711344 B1 DE 2711344B1 DE 19772711344 DE19772711344 DE 19772711344 DE 2711344 A DE2711344 A DE 2711344A DE 2711344 B1 DE2711344 B1 DE 2711344B1
- Authority
- DE
- Germany
- Prior art keywords
- mechanical seal
- insulating jacket
- temperature
- rings
- layers
- 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.)
- Granted
Links
Classifications
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3496—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member use of special materials
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Mechanical Sealing (AREA)
- Sealing Devices (AREA)
Description
Die Erfindung bezieht sich auf eine Gleitringdichtung für Pumpenwellen für den Einsatz unter Temperaturschockbedingungen. The invention relates to a mechanical seal for pump shafts for use under temperature shock conditions.
Das Dichtungssystem kann thermischen Störungen unterliegen. Ein Temperaturschock, verursacht durch eine ansteigende oder abfallende Temperatur des abzudichtenden Mediums, führt zu Verformungen der Ringe und damit zur Leckagenänderung während der thermischen Störung, oder es tritt durch die Verformung Verschleiß der Ringe auf und damit eine Minderung der Betriebssicherheit. Erfahrungsgemäß findet ein intensiver Wärmeaustausch immer zuerst an einer bestimmten Stelle der Oberfläche des Dichtungskörpers statt, während die restliche Oberfläche und das Körperinnere erst mit Verspätung der Temperaturänderung unterworfen sind. Um eine durch Temperaturschock hervorgerufene Verwerfung der Ringe zu vermeiden, muß Sorge dafür getragen werden, daß ein Wärmeaustausch gleichzeitig in allen Teilen des Dichtkörpers erfolgt.The sealing system can be subject to thermal disturbances. A temperature shock caused by a rising or falling temperature of the medium to be sealed leads to deformations of the Rings and thus to change the leakage during the thermal disturbance, or it occurs due to the deformation Wear of the rings and thus a reduction in operational safety. According to experience an intensive heat exchange always takes place first at a certain point on the surface of the sealing body, while the rest of the surface and the The inside of the body is only subject to temperature change with a delay. To one by temperature shock To avoid caused warping of the rings, care must be taken that a Heat exchange takes place simultaneously in all parts of the sealing body.
Es ist daher Aufgabe der Erfindung, eine Gleitringdichtung zu schaffen, die gegen die geschilderten ungünstigen Auswirkungen von Temperaturschocks geschützt ist, also Verwerfungen der Ringe unter Temperaturschock vermeidet.It is therefore the object of the invention to create a mechanical seal that is against the described is protected from adverse effects of temperature shocks, so warping of the rings below Avoids temperature shock.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst,According to the invention, this object is achieved by
ίο daß die Oberflächenteile des Dichtungskörpers, die dem Temperaturschock zuerst ausgesetzt sind, mit einem Isoliermantel versehen sind, der aus einer oder mehreren Schichten besteht, die eine kleinere Wärmeleitzahl haben als das Material des Dichtungskörpers.ίο that the surface parts of the sealing body that the First exposed to thermal shock, are provided with an insulating jacket consisting of an or consists of several layers that have a lower thermal conductivity than the material of the sealing body.
Durch die erfindungsgemäße Ausführung wird erreicht, daß der Wärmeaustausch an den betreffenden Stellen gehemmt ist, was zu einem gleichmäßigeren Wärmeübergang über die Gesamtoberfläche der Gleitringdichtung bei einem Temperaturschock führt.The embodiment according to the invention ensures that the heat exchange to the relevant Places is inhibited, resulting in a more uniform heat transfer over the entire surface of the Mechanical seal leads in the event of a temperature shock.
Es wird weiterhin vorgeschlagen, daß der Isoliermantel aus Schichten besteht, die durch mit Flüssigkeiten oder Gasen gefüllte Räume getrennt sind.It is also proposed that the insulating jacket consists of layers that are penetrated with liquids or spaces filled with gases are separated.
Anhand eines Ausführungsbeispiels wird die Erfindung dargestellt. Die Zeichnung zeigt einen Schnitt durch eine erfindungsgemäß gestaltete Gleitringdichtung. Die Gleitringe 1 und 2 sind jeweils mit einem Isoliermantel 3 überzogen. Das mit ansteigender oder abfallender Temperatur in den Gleitringbereich gelangende Medium trifft zunächst vor allem auf den Isoliermantel 3. Die Temperatur teilt sich dem darunterliegenden Material der Ringe 1 und 2 nur sehr verzögert mit. Während das Medium allmählich auch in die übrigen Oberflächenbereiche der Ringe 1 und 2 gelangt und dort eine Temperaturänderung hervorruft,The invention is illustrated using an exemplary embodiment. The drawing shows a section by a mechanical seal designed according to the invention. The slip rings 1 and 2 are each with a Insulating jacket 3 covered. That which comes into the sliding ring area with increasing or decreasing temperature First of all, the medium hits the insulating jacket 3. The temperature is divided by the underlying material of rings 1 and 2 only very delayed with. While the medium is also gradually in reaches the remaining surface areas of rings 1 and 2 and causes a temperature change there,
tritt auch unterhalb des Isoliermantels 3 allmählich eine entsprechend gleiche Temperaturänderung ein.also gradually occurs below the insulating jacket 3 correspondingly the same temperature change.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (2)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772711344 DE2711344C2 (en) | 1977-03-16 | 1977-03-16 | Mechanical seal |
| AT20578A AT354855B (en) | 1977-03-16 | 1978-01-12 | MECHANICAL SEAL |
| JP677478A JPS53113956A (en) | 1977-03-16 | 1978-01-26 | Sliding ring packing |
| GB628378A GB1596804A (en) | 1977-03-16 | 1978-02-16 | Sliding ring seal |
| BR7801017A BR7801017A (en) | 1977-03-16 | 1978-02-21 | SLIDING RINGS GASKET |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772711344 DE2711344C2 (en) | 1977-03-16 | 1977-03-16 | Mechanical seal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2711344B1 true DE2711344B1 (en) | 1978-04-13 |
| DE2711344C2 DE2711344C2 (en) | 1984-03-29 |
Family
ID=6003723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19772711344 Expired DE2711344C2 (en) | 1977-03-16 | 1977-03-16 | Mechanical seal |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS53113956A (en) |
| AT (1) | AT354855B (en) |
| BR (1) | BR7801017A (en) |
| DE (1) | DE2711344C2 (en) |
| GB (1) | GB1596804A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2945932A1 (en) * | 1979-11-14 | 1981-05-21 | Messer Griesheim Gmbh, 6000 Frankfurt | SEALING DEVICE FOR A CENTRIFUGAL PUMP FOR CONVEYING CRYOGENIC MEDIA |
| EP0112992A1 (en) * | 1982-11-27 | 1984-07-11 | Goetze Ag | Mechanical seal |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0805864D0 (en) * | 2008-04-01 | 2008-04-30 | Crane John Uk Ltd | Internally pressurised seals |
-
1977
- 1977-03-16 DE DE19772711344 patent/DE2711344C2/en not_active Expired
-
1978
- 1978-01-12 AT AT20578A patent/AT354855B/en not_active IP Right Cessation
- 1978-01-26 JP JP677478A patent/JPS53113956A/en active Pending
- 1978-02-16 GB GB628378A patent/GB1596804A/en not_active Expired
- 1978-02-21 BR BR7801017A patent/BR7801017A/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2945932A1 (en) * | 1979-11-14 | 1981-05-21 | Messer Griesheim Gmbh, 6000 Frankfurt | SEALING DEVICE FOR A CENTRIFUGAL PUMP FOR CONVEYING CRYOGENIC MEDIA |
| EP0112992A1 (en) * | 1982-11-27 | 1984-07-11 | Goetze Ag | Mechanical seal |
Also Published As
| Publication number | Publication date |
|---|---|
| AT354855B (en) | 1979-02-11 |
| GB1596804A (en) | 1981-09-03 |
| DE2711344C2 (en) | 1984-03-29 |
| JPS53113956A (en) | 1978-10-04 |
| BR7801017A (en) | 1978-11-14 |
| ATA20578A (en) | 1979-06-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8281 | Inventor (new situation) |
Free format text: KALVODA, FRANZ-XAVER, 6710 FRANKENTHAL, DE |
|
| 8339 | Ceased/non-payment of the annual fee |