DE19541016A1 - Oil wiper for piston of internal combustion engine, compressor etc. - Google Patents
Oil wiper for piston of internal combustion engine, compressor etc.Info
- Publication number
- DE19541016A1 DE19541016A1 DE1995141016 DE19541016A DE19541016A1 DE 19541016 A1 DE19541016 A1 DE 19541016A1 DE 1995141016 DE1995141016 DE 1995141016 DE 19541016 A DE19541016 A DE 19541016A DE 19541016 A1 DE19541016 A1 DE 19541016A1
- Authority
- DE
- Germany
- Prior art keywords
- piston
- tongue
- oil
- oil scraper
- internal combustion
- 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- Withdrawn
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
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—Details
- F16J9/20—Rings with special cross-section; Oil-scraping rings
- F16J9/206—One-piece oil-scraping rings
-
- 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
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/08—Constructional features providing for lubrication
-
- 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
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—Details
- F16J9/20—Rings with special cross-section; Oil-scraping rings
- F16J9/203—Oil-scraping rings
Abstract
Description
Die Erfindung betrifft eine Ölabstreifeinrichtung für Kolben von Verbrennungsmotoren, Kompressoren und anderen Kraft- und Arbeitsmaschinen, bei welcher ohne Verstärkung der Anpreßkraft der bekannten Ölabstreifringe oder ohne erhöhte Anzahl solcher Ringe eine stark abstreifende Wirkung und daraus resultierend ein nahezu schmierstoff freier Betrieb in der Zylinder/Kolben-Gruppe möglich ist.The invention relates to an oil wiper device for Pistons for internal combustion engines, compressors and others Power and work machines, in which without reinforcement the contact pressure of the known oil control rings or without increased number of such rings a strongly stripping Effect and as a result an almost lubricant free operation in the cylinder / piston group is possible.
Ein sehr schmierstoffarmer Betrieb ist besonders für die Kolben moderner Verbrennungsmotoren erforderlich, da die mit dem Abgas entweichenden Ölanteile einen beträchtlichen Anteil an der Schadstoffemission (Partikel) haben. Gravierend ist dieses Problem bei modernen Zweitaktmotoren, da beim Überlaufen der Steuerschlitze durch Kolben und Ringe die Neigung zum Öleinschleusen in die Ein- und Auslaßkanäle besonders stark ist.A very low-lubrication operation is particularly important for those Pistons of modern internal combustion engines are required because the a considerable amount of oil escaping with the exhaust gas Have a share in the pollutant emissions (particles). This problem is serious with modern ones Two-stroke engines, since the control slots overflow through pistons and rings the tendency to inject oil into the inlet and outlet channels are particularly strong.
Die bekannten Ausführungen von Ölabstreifringen sind überwiegend in Nuten des Kolbens eingesetzt, die einen mehr oder weniger großen Abstand vom unteren Kolbenende haben. Insofern ist stets ein Spalt zwischen Kolben und Zylinderwand vorhanden, in welchem das Medium eindringen kann. Besonders wenn bei geneigten oder liegenden Motoren das Rückflußöl aus dem Kolbeninneren direkt auf die Zylinderwandung läuft, kann viel Öl in den genannten Spalt eindringen. Dadurch kann der Ölabstreifring die abzustreifende Ölmenge nicht mehr bewältigen. Von Nachteil ist ferner, daß er das abgestreifte Öl vorzugsweise über radiale Bohrungen ins Kolbeninnere befördern muß, also dorthin, wo das Rückflußöl strömt.The known designs of oil control rings are mainly used in the grooves of the piston, one more or less than the lower end of the piston. In this respect there is always a gap between the piston and Cylinder wall in which the medium penetrate can. Especially when inclined or lying Motors the reflux oil from the inside of the piston directly the cylinder wall is running, there can be a lot of oil in the mentioned Penetrate gap. This allows the oil ring No longer manage the amount of oil to be stripped. A disadvantage is also that he preferably over the stripped oil radial bores into the interior of the piston must, so where the reflux oil flows.
Der Erfindung liegt die Aufgabe zugrunde, die genannten Nachteile zu vermeiden und ohne besondere oder sehr stark gespannte Abstreifringe eine stark abstreifende Wirkung zu erreichen.The invention is based on the object To avoid disadvantages and without special or very strong tensioned scraper rings to a strong scraping effect to reach.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß direkt am unteren Ende des Kolbens das hauptsächlich ölabstreifende Element angebracht ist und somit schon dort ein Eindringen von Öl in den Spalt zwischen Kolben und Zylinder stark verringert wird. Damit kann auch weniger Öl bis zur Ringnut des Ölabstreifringes vordringen, womit dessen erforderliche Abstreifarbeit erleichtert wird. Das ölabstreifende Element besteht aus einem dünnwandigen Ring, der zur Zylinderwand in einem spitzen Winkel ausläuft und an den Kolben angearbeitet oder als gesondertes Bauteil in diesen eingesetzt ist. Um die Wirkung des normalen Ölabstreifringes weiterhin zu verbessern, sind die vom Nutgrund des Abstreifringes zum Kolbeninneren führenden Ablaufbohrungen besonders gestaltet. In herkömmlicher Weise führen diese Ablaufbohrungen radial ins Kolbeninnere. Bei schräggestellten Motoren oder Motoren mit liegenden Zylindern werden diese Ablaufbohrungen jedoch rückwärtig von abfließenden Lagerschmier- und Kolbenkühlöl beaufschlagt, so daß der Ölabstreifring entgegen diesem Ölfluß das von ihm abgestreifte Öl ins Kolbeninnere fördern muß. Damit ist er überlastet. Erfindungsgemäß führen die Ablaufbohrungen deshalb nicht ins Kolbeninnere, sondern stehen mit weiteren Ablaufbohrungen, die in Kolbenlängsachse liegen, in Verbindung. Auf diese Weise wird die Ölringnut vom Rückflußöl im Kolbeninneren entlastet.The object is achieved in that directly mainly at the lower end of the piston oil-stripping element is attached and therefore already there penetration of oil into the gap between the piston and Cylinder is greatly reduced. It can also use less oil penetrate to the ring groove of the oil control ring, with which the necessary stripping work is facilitated. The oil-wiping element consists of a thin-walled element Ring that ends at an acute angle to the cylinder wall and worked on the piston or as a separate component is used in these. To the effect of the normal Oil scraper ring continue to improve, those of Groove base of the scraper ring leading to the inside of the piston Drain holes specially designed. In a conventional way lead these drain holes radially into the inside of the piston. For inclined motors or motors with horizontal However, these drain holes become cylinders to the rear of draining bearing lubricating and piston cooling oil pressurized so that the oil control ring against this Oil flow convey the oil stripped off into the inside of the piston got to. So he is overloaded. According to the lead Drain bores therefore not into the inside of the piston, but instead are available with additional drain holes in the longitudinal axis of the piston lie in connection. In this way, the oil ring groove relieved of the return oil inside the piston.
In den Zeichnungen sind zwei Ausführungsbeispiele der Erfindung dargestellt.In the drawings, two embodiments of the Invention shown.
Es zeigen:Show it:
Fig. 1 einen Längsschnitt durch einen Kolben, bei welchem die Ölabstreifeinrichtung als gesondertes Bauteil eingesetzt ist; Fig. 1 shows a longitudinal section through a piston, wherein the oil scraper is used as a separate component;
Fig. 2 einen vergrößerten Ausschnitt aus Fig. 1; FIG. 2 shows an enlarged detail from FIG. 1;
Fig. 3 einen Längsschnitt mit einer an den Kolben angearbeiteten Ölabstreifvorrichtung, ebenfalls als vergrößerter Ausschnitt. Fig. 3 shows a longitudinal section with an oil wiping device worked on the piston, also as an enlarged section.
Bei dem in Fig. 1 und Fig. 2 dargestellten Ausführungsbeispiel ist in dem Kolben 1 der Abstreifer 2 fest eingesetzt. Der herkömmliche Ölabstreifring, der in der Zeichnung nicht dargestellt ist, wird in der Nut 3 geführt und in der sonst üblichen Weise würde das von diesem abgestreifte Öl über die Radialbohrung 4, von welcher mehrere über dem Kolbenumfang angeordnet sind, in das Kolbeninnere zurückfließen.In the example shown in Fig. 1 and Fig. 2 embodiment, in the piston 1, the liner 2 is inserted firmly. The conventional oil scraper ring, which is not shown in the drawing, is guided in the groove 3 and in the otherwise customary manner the oil stripped from it would flow back into the interior of the piston via the radial bore 4 , several of which are arranged over the piston circumference.
Durch den erfindungsgemäß ausgebildeten Abstreifer 2 wird die Radialbohrung 4 verschlossen. Für den Ölabfluß besitzt der Abstreifer 2 in Fortsetzung der Radialbohrung 4 eine Sackbohrung 5, welche wiederum mit einer Ablaufbohrung 6 in Verbindung steht. Der Ölabfluß erfolgt damit in Richtung der Kolbenlängsachse und insbesondere bei schräggestellten oder liegenden Motoren kann das Rücklauföl im Kolbeninneren die Radialbohrung 4 nicht rückwärtig beaufschlagen.The radial bore 4 is closed by the scraper 2 designed according to the invention. For the oil drain, the scraper 2 has a blind bore 5 in continuation of the radial bore 4 , which in turn is connected to a drain bore 6 . The oil drainage thus takes place in the direction of the longitudinal axis of the piston and, in particular in the case of inclined or lying engines, the return oil inside the piston cannot act on the radial bore 4 from the rear.
Der Abstreifer 2 besitzt ferner eine Zunge 7, welche das Kolbenende bildet. Diese Zunge 7 ist mit einer Wandstärke von 0,3-0,8 mm besonders dünnwandig gestaltet und verläuft mit einer schrägen Kante 9 zum Kolbendurchmesser aus. Sie kann dadurch mit einem sehr geringen Einbauspiel eingebaut werden, ohne daß von ihr eine unzulässig hohe Radialpressung auf die Zylinderwand 8 ausgeübt wird. Auch wenn, z. B. durch ungünstige Betriebsverhältnisse des Motors, der Abstreifer 2 zum Klemmen oder Festgehen im Zylinder neigen will, ist diese Gefahr infolge der Dünnwandigkeit und damit radialen Verformungsmöglichkeit der Zunge 7 stark verringert. Erfindungsgemäß liegen deshalb, wie in Fig. 2 dargestellt, die Punkte A und B in verschiedener Höhe. Wo die Zunge 7 in den dickeren Teil des Abstreifers 2 übergeht (Punkt A), ist der eng eingepaßte Teil der Zunge 7 bereits beendet (Punkt B).The scraper 2 also has a tongue 7 which forms the piston end. This tongue 7 is particularly thin-walled with a wall thickness of 0.3-0.8 mm and extends with an oblique edge 9 to the piston diameter. As a result, it can be installed with very little installation play, without it exerting an impermissibly high radial pressure on the cylinder wall 8 . Even if, e.g. B. by unfavorable operating conditions of the engine, the scraper 2 to tend to jam or seize in the cylinder, this risk is greatly reduced due to the thin walls and thus radial deformation possibility of the tongue 7 . According to the invention, therefore, as shown in FIG. 2, points A and B are at different heights. Where the tongue 7 merges into the thicker part of the scraper 2 (point A), the tightly fitted part of the tongue 7 has already ended (point B).
In der Fig. 3 ist ein an den Kolben 1 angearbeiteter Abstreifer 2 dargestellt. Der Kolben 1 und die Zunge 7 bestehen hier aus einem Stück, im übrigen entsprechen die Gestaltung und die Abmessungen denjenigen nach Fig. 1 und 2. Die in Kolbenlängsachse verlaufende Ablaufbohrung 6 schneidet die Nut 3 direkt an, so daß wie bereits beschrieben das Rücklauföl im Kolbeninneren die Nut 3 nicht beaufschlagen kann.In Fig. 3 a is revised to the piston 1 scraper 2 is shown. The piston 1 and the tongue 7 consist of one piece, otherwise the design and dimensions correspond to those of FIGS . 1 and 2. The drain hole 6 running in the longitudinal axis of the piston cuts the groove 3 directly, so that, as already described, the return oil in The inside of the piston cannot act on the groove 3 .
BezugszeichenlisteReference list
1 Kolben
2 Abstreifer
3 Nut
4 Radialbohrung
5 Sackbohrung
6 Ablaufbohrung
7 Zunge
8 Zylinderwand
9 Kante 1 piston
2 wipers
3 groove
4 radial bore
5 blind hole
6 drain hole
7 tongue
8 cylinder wall
9 edge
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1995141016 DE19541016A1 (en) | 1995-11-03 | 1995-11-03 | Oil wiper for piston of internal combustion engine, compressor etc. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1995141016 DE19541016A1 (en) | 1995-11-03 | 1995-11-03 | Oil wiper for piston of internal combustion engine, compressor etc. |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19541016A1 true DE19541016A1 (en) | 1997-05-07 |
Family
ID=7776550
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1995141016 Withdrawn DE19541016A1 (en) | 1995-11-03 | 1995-11-03 | Oil wiper for piston of internal combustion engine, compressor etc. |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19541016A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005066474A1 (en) * | 2004-01-06 | 2005-07-21 | Chee Kiat Foo | Scotch yoke mechanism and piston arrangement |
CN101994598A (en) * | 2009-08-12 | 2011-03-30 | 斗山英维高株式会社 | Piston for engine having stable behavior of piston ring |
Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE247925C (en) * | ||||
DE423056C (en) * | 1924-03-20 | 1925-12-18 | Otto August Banner | Device to avoid lubricating oil loss and the deterioration of the lubricating oil in oil machines with hollow pistons |
US1778200A (en) * | 1927-12-17 | 1930-10-14 | Electric Boat Co | Piston and ring mounting therefor |
DE699796C (en) * | 1938-11-19 | 1940-12-06 | Schweizerische Lokomotiv | Piston with piston rings for high working pressure |
DE719682C (en) * | 1938-09-20 | 1942-04-15 | Messerschmitt Boelkow Blohm | One-piece piston |
DE969837C (en) * | 1953-02-04 | 1958-07-24 | Kloeckner Humboldt Deutz Ag | piston |
AT230683B (en) * | 1960-11-25 | 1963-12-30 | Philips Gloeimlampenfabrieken | Sealing arrangement between two at least substantially coaxially arranged mutually movable bodies |
GB973780A (en) * | 1962-01-04 | 1964-10-28 | Gelusema Anstalt | Plunger-type injection moulding machines |
CH413532A (en) * | 1961-01-03 | 1966-05-15 | Licentia Gmbh | Pressure cylinder with a piston that can be acted upon on both sides for hydraulic actuators |
US3733973A (en) * | 1970-02-21 | 1973-05-22 | Maschf Augsburg Nuernberg Ag | Piston,especially for compression ignition engines |
DE2550317A1 (en) * | 1975-11-08 | 1977-05-18 | Daimler Benz Ag | Piston for diesel IC engine - has oil control ring situated below connecting rod bearing |
DE3340817C2 (en) * | 1983-11-11 | 1986-05-15 | Akzo Gmbh, 5600 Wuppertal | Connecting rod-piston arrangement for cylinder-piston engines |
DE4011535A1 (en) * | 1990-04-10 | 1991-10-17 | Man B & W Diesel Ag | Piston for IC engine - has several compression ring below which is oil scraper ring with pressure unloading holes leading from its groove to piston interior |
US5133563A (en) * | 1988-11-04 | 1992-07-28 | Borgo-Nova Spa | Two ring piston with lower tapered L-shaped ring |
DE4338074A1 (en) * | 1992-11-12 | 1994-05-19 | Dana Corp | Piston ring for IC engine - is shaped from single material strip with two flanges extending sideways outwards in opposite directions and pressed against cylinder wall for sealing engagement. |
-
1995
- 1995-11-03 DE DE1995141016 patent/DE19541016A1/en not_active Withdrawn
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE247925C (en) * | ||||
DE423056C (en) * | 1924-03-20 | 1925-12-18 | Otto August Banner | Device to avoid lubricating oil loss and the deterioration of the lubricating oil in oil machines with hollow pistons |
US1778200A (en) * | 1927-12-17 | 1930-10-14 | Electric Boat Co | Piston and ring mounting therefor |
DE719682C (en) * | 1938-09-20 | 1942-04-15 | Messerschmitt Boelkow Blohm | One-piece piston |
DE699796C (en) * | 1938-11-19 | 1940-12-06 | Schweizerische Lokomotiv | Piston with piston rings for high working pressure |
DE969837C (en) * | 1953-02-04 | 1958-07-24 | Kloeckner Humboldt Deutz Ag | piston |
AT230683B (en) * | 1960-11-25 | 1963-12-30 | Philips Gloeimlampenfabrieken | Sealing arrangement between two at least substantially coaxially arranged mutually movable bodies |
CH413532A (en) * | 1961-01-03 | 1966-05-15 | Licentia Gmbh | Pressure cylinder with a piston that can be acted upon on both sides for hydraulic actuators |
GB973780A (en) * | 1962-01-04 | 1964-10-28 | Gelusema Anstalt | Plunger-type injection moulding machines |
US3733973A (en) * | 1970-02-21 | 1973-05-22 | Maschf Augsburg Nuernberg Ag | Piston,especially for compression ignition engines |
DE2550317A1 (en) * | 1975-11-08 | 1977-05-18 | Daimler Benz Ag | Piston for diesel IC engine - has oil control ring situated below connecting rod bearing |
DE3340817C2 (en) * | 1983-11-11 | 1986-05-15 | Akzo Gmbh, 5600 Wuppertal | Connecting rod-piston arrangement for cylinder-piston engines |
US5133563A (en) * | 1988-11-04 | 1992-07-28 | Borgo-Nova Spa | Two ring piston with lower tapered L-shaped ring |
DE4011535A1 (en) * | 1990-04-10 | 1991-10-17 | Man B & W Diesel Ag | Piston for IC engine - has several compression ring below which is oil scraper ring with pressure unloading holes leading from its groove to piston interior |
DE4338074A1 (en) * | 1992-11-12 | 1994-05-19 | Dana Corp | Piston ring for IC engine - is shaped from single material strip with two flanges extending sideways outwards in opposite directions and pressed against cylinder wall for sealing engagement. |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005066474A1 (en) * | 2004-01-06 | 2005-07-21 | Chee Kiat Foo | Scotch yoke mechanism and piston arrangement |
CN101994598A (en) * | 2009-08-12 | 2011-03-30 | 斗山英维高株式会社 | Piston for engine having stable behavior of piston ring |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8122 | Nonbinding interest in granting licenses declared | ||
8110 | Request for examination paragraph 44 | ||
8130 | Withdrawal |