EP2107211A2 - Disc seal in particular for an oscillating motor - Google Patents
Disc seal in particular for an oscillating motor Download PDFInfo
- Publication number
- EP2107211A2 EP2107211A2 EP09155951A EP09155951A EP2107211A2 EP 2107211 A2 EP2107211 A2 EP 2107211A2 EP 09155951 A EP09155951 A EP 09155951A EP 09155951 A EP09155951 A EP 09155951A EP 2107211 A2 EP2107211 A2 EP 2107211A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- groove
- seal
- inserts
- sealing body
- disk
- 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.)
- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C19/00—Sealing arrangements in rotary-piston machines or engines
- F01C19/02—Radially-movable sealings for working fluids
- F01C19/04—Radially-movable sealings for working fluids of rigid material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C9/00—Oscillating-piston machines or engines
- F01C9/002—Oscillating-piston machines or engines the piston oscillating around a fixed axis
Definitions
- the DE 10 2004 032 747 A1 or the DE 103 58 519 A1 describe a disc seal within grooves of ribs and vanes of a swing motor.
- a disk seal comprises a sealing body, for. B. formed by a sealing frame and an inner part, and in each case a laterally coordinated to the sealing body filler.
- the filler after the DE 103 58 519 A1 should preferably consist of PTFE, which has no residual stress and is optimized in terms of a low coefficient of friction.
- the object of the present invention is to further develop a window seal such that its sealing function is improved.
- the object is achieved in that the inserts are designed to be elastic and in the relaxed state in the longitudinal direction relative to the groove side surfaces have a curved body shape.
- the supplements are in the region of their ends on the seal body.
- the pressure medium always ensures a penetration of the filler in the direction of the seal body when it penetrates into the groove
- the disc seal in the relaxed state has a greater width than the groove and in the prestressed state is narrower than the groove, so that there is a defined gap between the side facing away from the sealing body and a groove side surface.
- the filler should be as possible fixed in the groove and can not perform a defined swimming movement between the seal body and a groove side wall.
- the curvature of the filler falls dimensionally relatively small, at least so small that a confusion of installation position is not excluded. Therefore, the inserts have a mark for an oriented mounting.
- the marking is formed by a profile on the side facing away from the sealing body of the filler, so that the covering function of the filler to the sealing body is not adversely affected.
- the Fig. 1 shows an assembly in the form of a swing motor 1 in a longitudinal sectional view with a cylinder 3, in which a motor shaft 5 is rotatably mounted. With the cylinder 3 end lid 7 and 9 are welded. On the inner wall 11 of the cylinder 3 are two ribs 13 (FIG. Fig. 2 ) arranged with wings 15 of the motor shaft 5, the cylinder 3 and the covers 7; 9 four working chambers 17; Form 19, wherein working chambers with the same reference numeral via a pressure medium distribution system starting from hydraulic ports 21; 23 and transverse channels 25; 27 are interconnected within the motor shaft. The number of working chambers depends on the torque to be applied and on the required swivel angle of the slewing motor.
- seals 31; 33 inserted in the design of disc seals, each of which separate adjacent working chambers.
- Both covers 7; 9 form together with the motor shaft 5 annular spaces 37; 39, the seal assemblies 41; 43 for sealing the working chambers 17; 19 record.
- pressurizing a common group of working chambers, e.g. B. 17 and a relatively smaller pressure in the working chambers 19 is a very low flow of oil into the annular spaces 37; Pressed 39, as set by the different pressure from the working chambers in the circumferential direction a slight deformation of the seal assembly and thus pressure medium from the working chambers 17 at a high pressure in the annular spaces 37, 39 penetrates.
- the pressure medium volume occurring in particular at low working chamber pressures after high pressure phases are comparatively very small, but it could happen that z. B.
- annular space 37 a larger momentary pressure of the pressure medium prevails as in the annular space 39. So that no axially effective displacement forces between the cylinder 3 with the covers 7, 9 and the motor shaft 5 occur, both annular spaces 37; 39 via a pressure equalization channel 45, s. Fig. 3 , connected with each other.
- the pressure equalization channel is at least part of the length of the disk seals 31; 33 formed, which are arranged in a groove of the wing and / or the rib.
- the pressure equalization channel is formed by a groove running in the longitudinal direction of the disk seal.
- the annular spaces 37; 39 via branch channels 47; 49 connected in the motor shaft with the pressure equalization channel 45, wherein the branch channels open at a distance from the outer end of the disk seal 31 in the pressure equalization channel 45.
- FIG. 4 shows a vertical section through the window seal 33
- the sealing body 33d comprises a circumferential sealing frame with an inner part.
- the inner part 33i is formed in this embodiment of three disc-shaped biasing springs.
- On both sides of the sealing body filling body 33f are arranged, which are designed resiliently and in the relaxed state in the longitudinal direction relative to the groove side surfaces 51 shown in dashed lines; 53 have a curved body shape.
- the inserts 33f lie in the region of their ends on the sealing body 33d and in the central region on the groove side surfaces 51; 55 on. Furthermore, it can be seen that the disk seal 33 in the relaxed state has a greater width than the groove and in the prestressed state, represented by a dash-2-dot line, is narrower than the groove, so that between the sealing body facing away from the side of the filler 33f and the groove side surface 53 is a defined gap 55. This gap 55 serves to selectively supply the disk seal 33 with pressure medium in order to increase the sealing effect of the sealing frame 33r and thereby bias the entire disk seal 33 onto a groove side surface 51.
- the supplements 33f can relax within limits, without sticking to the sealing body 33d, so that no enclosed pressure medium volume can be held within the disk package.
- the inserts 33f have a mark 57, FIGS. 5 and 6 on, which is formed by a profile on the side facing away from the sealing body 33d side of the filler 33f.
- the profile 57, z. B. a longitudinal groove is optically clear and can, for. B. be combined with a mounting device in which the disc seal is prefabricated independently of the swivel motor.
- a mounting device could, for. B. in the region of their groove side surfaces have a longitudinally extending radially inwardly projecting small rib, which is compatible with the longitudinal groove of the filler 33f.
- the filling piece 33f would not be able to be inserted axially, ie into the device in the longitudinal direction of the groove, but would be rejected due to the excess width of the entire pane seal 33 as a result of the shape. This would clearly indicate in the assembly process that the filler 33f must be rotated for the correct position.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Motors (AREA)
- Motor Or Generator Frames (AREA)
- Sealing Devices (AREA)
Abstract
Description
Die
Im genannten Stand der Technik wird ausführlich die Funktion der Beilagen zur Unterstützung der Dichtwirkung beschrieben, nämlich die gezielte Zuführung von Druckmedium an den Dichtungskörper, wobei die Wirkrichtung des Druckmediums bei einer Änderung der Drehrichtung des Schwenkmotors wechselt.In the cited prior art, the function of the inserts to support the sealing effect is described in detail, namely the targeted supply of pressure medium to the sealing body, wherein the effective direction of the pressure medium changes with a change in the direction of rotation of the pivot motor.
Die Aufgabe der vorliegenden Erfindung besteht darin, eine Scheibendichtung derart weiterzuentwickeln, dass deren Dichtfunktion verbessert wird.The object of the present invention is to further develop a window seal such that its sealing function is improved.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass die Beilagen elastisch ausgeführt sind und im entspannten Zustand in Längsrichtung bezogen auf die Nutseitenflächen eine gekrümmte Körperform aufweisen.According to the invention the object is achieved in that the inserts are designed to be elastic and in the relaxed state in the longitudinal direction relative to the groove side surfaces have a curved body shape.
Durch die Eigenelastizität in Verbindung mit der gekrümmten Körperform wird ein Ankleben des Füllstücks am mittigen Dichtungskörper verhindert. Ein am Dichtungskörper herrschender Druck kann sich schneller ab und wieder aufbauen.The inherent elasticity in conjunction with the curved body shape prevents sticking of the filler to the central seal body. A pressure prevailing on the sealing body can build up faster and again.
In weiterer vorteilhafter Ausgestaltung liegen die Beilagen im Bereich ihrer Enden am Dichtungskörper an. Das Druckmedium sorgt bei einem Eindringen in die Nut stets für eine Vorspannung des Füllstücks in Richtung des DichtungskörpersIn a further advantageous embodiment, the supplements are in the region of their ends on the seal body. The pressure medium always ensures a penetration of the filler in the direction of the seal body when it penetrates into the groove
Dabei ist vorgesehen, dass die Scheibendichtung im entspannten Zustand eine größere Breite aufweist als die Nut und im vorgespannten Zustand schmaler ist als die Nut, so dass zwischen der dem Dichtungskörper abgewandten Seite und einer Nutseitenfläche ein definierter Spalt vorliegt. Das Füllstück soll möglichst in der Nut fixiert sein und nicht zwischen dem Dichtungskörper und einer Nutseitenwand eine definierte Schwimmbewegung ausführen können.It is provided that the disc seal in the relaxed state has a greater width than the groove and in the prestressed state is narrower than the groove, so that there is a defined gap between the side facing away from the sealing body and a groove side surface. The filler should be as possible fixed in the groove and can not perform a defined swimming movement between the seal body and a groove side wall.
Die Krümmung des Füllstücks fällt maßlich relativ klein aus, jedenfalls so klein, dass eine Verwechselung der Einbaulage nicht ausgeschlossen ist. Deshalb weisen die Beilagen eine Markierung für eine orientierte Montage auf.The curvature of the filler falls dimensionally relatively small, at least so small that a confusion of installation position is not excluded. Therefore, the inserts have a mark for an oriented mounting.
Die Markierung wird von einem Profil auf der dem Dichtungskörper abgewandten Seite des Füllstücks gebildet, so dass die Abdeckfunktion des Füllstücks zum Dichtungskörper nicht nachteilig beeinflusst wird.The marking is formed by a profile on the side facing away from the sealing body of the filler, so that the covering function of the filler to the sealing body is not adversely affected.
Anhand der folgenden Figurenbeschreibung soll die Erfindung näher erläutert werden.The invention will be explained in more detail with reference to the following description of the figures.
- Fig. 1 - 3Fig. 1-3
- Schnittdarstellungen eines erfindungsgemäßen SchwenkmotorsSectional views of a pivoting motor according to the invention
- Fig. 4Fig. 4
- Höhenschnitt durch eine ScheibendichtungVertical section through a window seal
- Fig. 5 u. 6Fig. 5 u. 6
- Füllstück als EinzelteilFiller as a single part
Die
Innerhalb der Flügel und Rippen sind Dichtungen 31; 33 in der Bauform von Scheibendichtungen eingelegt, die jeweils benachbarte Arbeitskammern voneinander trennen.Within the wings and ribs are
Beide Deckel 7; 9 bilden zusammen mit der Motorwelle 5 Ringräume 37; 39, die Dichtungsanordnungen 41; 43 zur Abdichtung der Arbeitskammern 17; 19 aufnehmen. Während der Druckbeaufschlagung einer gemeinsamen Gruppe von Arbeitskammern, z. B. 17 und einem vergleichsweise kleineren Druck in den Arbeitskammern 19 wird ein sehr geringer Ölstrom in die Ringräume 37; 39 gedrückt, da sich durch die unterschiedliche Druckbeaufschlagung aus den Arbeitskammern in Umfangsrichtung eine geringfügige Deformation der Dichtungsanordnung einstellt und damit Druckmittel aus den Arbeitskammern 17 mit einem hohen Druck in die Ringräume 37, 39 eindringt. Die insbesondere bei niedrigen Arbeitskammerdrücken nach Hochdruckphasen auftretenden Druckmittelvolumen sind vergleichsweise sehr klein, doch könnte der Fall eintreten, dass z. B. in dem Ringraum 37 ein größerer Momentandruck des Druckmittels vorherrscht als im Ringraum 39. Damit keinesfalls axial wirksame Verschiebekräfte zwischen dem Zylinder 3 mit den Deckeln 7, 9 und der Motorwelle 5 auftreten, sind beide Ringräume 37; 39 über einen Druckausgleichskanal 45, s.
Der Druckausgleichskanal wird zumindest auf einer Teillänge von den Scheibendichtungen 31; 33 gebildet, die in einer Nut des Flügels und/oder der Rippe angeordnet sind. In diesem Ausführungsbeispiel wird der Druckausgleichskanal von einer in Längsrichtung der Scheibendichtung verlaufenden Nut gebildet. Des Weiteren sind die Ringräume 37; 39 über Stichkanäle 47; 49 in der Motorwelle mit dem Druckausgleichskanal 45 verbunden, wobei die Stichkanäle in einem Abstand zum äußeren Ende der Scheibendichtung 31 in den Druckausgleichskanal 45 münden.The pressure equalization channel is at least part of the length of the
Die
Wie man weiter aus der
Die bildliche Darstellung der Krümmung der Beilagen 33f ist nicht maßstäblich ausgeführt. Tatsächlich fällt die Krümmung etwas geringer aus. Für eine orientierte Montage weisen die Beilagen 33f eine Markierung 57,
Claims (5)
dadurch gekennzeichnet,
dass die Beilagen (33f) elastisch ausgeführt sind und im entspannten Zustand in Längsrichtung bezogen auf die Nutseitenflächen (51; 53) eine gekrümmte Körperform aufweisen.Disk seal (31; 33) within a groove, in particular for a pivoting motor (1), wherein the disk seal (31; 33) has a sealing body (33d) to which disc-shaped inserts (33f) are assigned on both sides to groove side surfaces (51;
characterized,
in that the inserts (33f) are elastic and in the relaxed state have a curved body shape in the longitudinal direction relative to the groove side surfaces (51; 53).
dadurch gekennzeichnet,
dass die Beilagen (33f) im Bereich ihrer Enden am Dichtungskörper (33d) anliegen.Window seal according to claim 1,
characterized,
that the inserts (33f) in the region of its ends on the sealing body (33d) abut.
dadurch gekennzeichnet,
dass die Scheibendichtung (33) im entspannten Zustand eine größere Breite aufweist als die Nut und im vorgespannten Zustand schmaler ist als die Nut, so dass zwischen einer dem Dichtungskörper (33d) abgewandten Seite des Füllstück (33f) und einer Nutseitenfläche (51; 53) ein definierter Spalt (55) vorliegt.Window seal according to claim 1,
characterized,
page that the disc seal (33) has a greater width in the relaxed state than the groove and is narrower in the prestressed state than the groove, so that side facing away from a the sealing body (33d) of the filling piece (33f), and a groove side surface (51; 53) a defined gap (55) is present.
dadurch gekennzeichnet,
dass die Beilagen (33f) eine Markierung (57) für eine orientierte Montage aufweisen.Window seal according to claim 1,
characterized,
in that the inserts (33f) have a mark (57) for oriented mounting.
dadurch gekennzeichnet,
dass die Markierung (57) von einem Profil auf der dem Dichtungskörper (33d) abgewandten Seite des Füllstücks (33f) gebildet wird.Window seal according to claim 4,
characterized,
that the mark (57) is formed of the filler piece side (33f) facing away from a profile on the said seal body (33d).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008016749A DE102008016749A1 (en) | 2008-03-31 | 2008-03-31 | Window seal, in particular for a swivel motor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2107211A2 true EP2107211A2 (en) | 2009-10-07 |
EP2107211A3 EP2107211A3 (en) | 2015-01-14 |
Family
ID=40872426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09155951.8A Withdrawn EP2107211A3 (en) | 2008-03-31 | 2009-03-24 | Disc seal in particular for an oscillating motor |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2107211A3 (en) |
DE (1) | DE102008016749A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10358519A1 (en) | 2003-12-13 | 2005-07-07 | Bayerische Motoren Werke Ag | Sealing unit for a rotary engine comprises a plastic glide frame bounding an inner sealing element and carrying outer plates with bores oriented in the circumferential direction of the engine |
DE102004032747A1 (en) | 2004-07-07 | 2006-01-26 | Zf Friedrichshafen Ag | swing motor |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1224089B (en) * | 1963-06-28 | 1966-09-01 | Goetzewerke | Radial seal for pistons of rotary piston internal combustion engines |
DE4339527C1 (en) * | 1993-11-19 | 1995-02-16 | Freudenberg Carl Fa | Sealing arrangement |
DE10243696B3 (en) * | 2002-09-20 | 2004-03-11 | Zf Sachs Ag | Pivot motor has pressure equalization between working chambers provided via pressure equalization channel formed by groove between motor shaft and concentric sleeve |
DE10359870B3 (en) * | 2003-12-18 | 2005-07-21 | Busak + Shamban Gmbh | Sealing device for swing motor has sealing element able to be introduced into groove chamber in relaxed state |
-
2008
- 2008-03-31 DE DE102008016749A patent/DE102008016749A1/en not_active Ceased
-
2009
- 2009-03-24 EP EP09155951.8A patent/EP2107211A3/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10358519A1 (en) | 2003-12-13 | 2005-07-07 | Bayerische Motoren Werke Ag | Sealing unit for a rotary engine comprises a plastic glide frame bounding an inner sealing element and carrying outer plates with bores oriented in the circumferential direction of the engine |
DE102004032747A1 (en) | 2004-07-07 | 2006-01-26 | Zf Friedrichshafen Ag | swing motor |
Also Published As
Publication number | Publication date |
---|---|
EP2107211A3 (en) | 2015-01-14 |
DE102008016749A1 (en) | 2009-10-08 |
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