DE20204048U1 - sealing arrangement - Google Patents
sealing arrangementInfo
- Publication number
- DE20204048U1 DE20204048U1 DE20204048U DE20204048U DE20204048U1 DE 20204048 U1 DE20204048 U1 DE 20204048U1 DE 20204048 U DE20204048 U DE 20204048U DE 20204048 U DE20204048 U DE 20204048U DE 20204048 U1 DE20204048 U1 DE 20204048U1
- Authority
- DE
- Germany
- Prior art keywords
- sealing arrangement
- sealing ring
- rotor
- sealing
- arrangement according
- 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.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 title claims description 23
- 229920006302 stretch film Polymers 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- 230000001050 lubricating effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
- Gasket Seals (AREA)
Description
H.-J. Pauling Halle, 12.03.2002H.-J. Pauling Hall, March 12, 2002
Patentanwalt (Sache: 02P0147)Patent Attorney (Case: 02P0147)
Die Erfindung betrifft eine Dichtungsanordnung für Nuten der Drehdurchführung einer Aufwickelvorrichtung für die Herstellung von Rollen aus Stretchfolien.The invention relates to a sealing arrangement for grooves of the rotary feedthrough of a winding device for the production of rolls of stretch film.
Die Herstellung von Stretchfolien-Rollen aus Polyethylen erfolgt in komplexen Produktionslinien. Ein wesentlicher Bestandteil solcher Produktionslinien sind schnelllaufende Vorrichtungen zum Aufwickeln der Stretchfolien auf Rollen mit automatischen Rollenwechsel. The production of stretch film rolls made of polyethylene takes place in complex production lines. An essential component of such production lines are high-speed devices for winding the stretch film onto rolls with automatic roll changes.
Derartige Vorrichtungen werden pneumatisch gesteuert. Zu diesem Zweck weisen die Drehdurchführungen der Wicklertrommel mehrere Kanäle bzw. Nuten auf, die bisher mit üblichen Dichtungen in Form einfacher O-Ringe abgedichtet wurden.
Diese bekannte Form der Abdichtung weist jedoch mehrere Nachteile auf. Die O-Ringe drehen sich bereits nach kurzer Betriebszeit mit, werden gestaucht und gleichzeitig gestreckt - d.h. sie verformen sich und verursachen erhebliche Undichtheiten und Störungen im Ablauf der pneumatischen Steuerung auch durch Beeinflussung der benachbarten Kanäle bzw. Nuten.Such devices are controlled pneumatically. For this purpose, the rotary unions of the winding drum have several channels or grooves, which were previously sealed with conventional seals in the form of simple O-rings.
However, this known form of sealing has several disadvantages. The O-rings rotate after a short period of operation, are compressed and stretched at the same time - ie they deform and cause significant leaks and disruptions in the pneumatic control process, also by influencing the adjacent channels or grooves.
Die Aufgabe der Erfindung war es, hier Abhilfe zu schaffen, insbesondere eine geeignete Dichtungsanordnung, welche diese Nachteile nicht aufweist, zu entwickeln.The object of the invention was to remedy this situation, in particular to develop a suitable sealing arrangement which does not have these disadvantages.
Diese Aufgabe wird durch die kennzeichnenden Merkmale des Schutzanspruches 1 gelöst.This problem is solved by the characterizing features of claim 1.
In den Schutzansprüchen 2 bis 4 sind zweckmäßige Ausgestaltungen der Erfindung enthalten.Claims 2 to 4 contain expedient embodiments of the invention.
Die Erfindung wird im Folgenden anhand der Zeichnung näher erläutert.The invention is explained in more detail below with reference to the drawing.
Figur Ziffer 1 - zeigt schematisch eine Ausführungsform der Dichtungsanordnung.Figure 1 - shows schematically an embodiment of the sealing arrangement.
Eine Drehdurchführung (3) einer Aufwickelvorrichtung zur Herstellung von Rollen aus Stretchfolie weist gem. Figur 1 mehrere rechteckige Nuten, in denen sich Öffnungen von Luftkanälen befinden, auf. Jeweils auf den Nutgrund werden nebeneinander zwei übliche O-Ringe (1), z.B. 171 &khgr; 1,5 eingelegt. Darüber wird der eigentliche Rotordichtring (2) angeordnet. Diese weist einen rechteckigen Querschnitt auf und besteht aus einem PTFE-Kohle-Compound. Die äußere Oberfläche des Rotordichtringes (2) weist eine Schmiernut (4) auf.A rotary union (3) of a winding device for producing rolls of stretch film has, as shown in Figure 1, several rectangular grooves in which there are openings for air ducts. Two standard O-rings (1), e.g. 171 x 1.5, are placed next to each other on the base of the groove. The actual rotor sealing ring (2) is arranged above this. This has a rectangular cross-section and consists of a PTFE-carbon compound. The outer surface of the rotor sealing ring (2) has a lubrication groove (4).
Der Rotordichtring (2) kann vor dem Einlegen auf einem flachen Konus kurz geweitet werden. Nach dem Einlegen aller Dichtungsanordnungen werden sie noch kalibriert.The rotor sealing ring (2) can be briefly expanded on a flat cone before insertion. After all sealing arrangements have been inserted, they are calibrated.
Die erfindungsgemäße Dichtungsanordnung ermöglicht eine hohe Elastizität der Dichtungen u.a. durch die stützenden O-Ringe und durch eine formgerechte Anpassung des Rotordichtringes durch die Kalibrierung. Ein weiterer wesentlicher Vorteil ist der Verbleib der Dichtungsanordnung in der jeweiligen Nut. Es erfolgen keine Verformungen, kein Verrutschen der Dichtungen u.a. mehr. Die dadurch bisher hervorgerufenen Undichtheiten werden beseitigt.The sealing arrangement according to the invention enables a high elasticity of the seals, among other things due to the supporting O-rings and due to the correct adjustment of the rotor sealing ring through calibration. Another significant advantage is that the sealing arrangement remains in the respective groove. There is no more deformation, no more slipping of the seals, etc. The leaks that were previously caused by this are eliminated.
Die erfindungsgemäße Dichtungsanordnung kann auch bei anderen Nutformen solcher Vorrichtungen durch einfache Änderung der Geometrie des Rotordichtringes Verwendung finden.The sealing arrangement according to the invention can also be used in other groove shapes of such devices by simply changing the geometry of the rotor sealing ring.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20204048U DE20204048U1 (en) | 2002-03-12 | 2002-03-12 | sealing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20204048U DE20204048U1 (en) | 2002-03-12 | 2002-03-12 | sealing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE20204048U1 true DE20204048U1 (en) | 2002-08-22 |
Family
ID=7968924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE20204048U Expired - Lifetime DE20204048U1 (en) | 2002-03-12 | 2002-03-12 | sealing arrangement |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE20204048U1 (en) |
-
2002
- 2002-03-12 DE DE20204048U patent/DE20204048U1/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R207 | Utility model specification |
Effective date: 20020926 |
|
| R150 | Utility model maintained after payment of first maintenance fee after three years |
Effective date: 20050309 |
|
| R151 | Utility model maintained after payment of second maintenance fee after six years |
Effective date: 20080215 |
|
| R152 | Utility model maintained after payment of third maintenance fee after eight years |
Effective date: 20100329 |
|
| R071 | Expiry of right | ||
| R071 | Expiry of right |