DE3940301A1 - Piston ring with gas seal - has depressurised underside, with active contact surface and cylindrical surface - Google Patents

Piston ring with gas seal - has depressurised underside, with active contact surface and cylindrical surface

Info

Publication number
DE3940301A1
DE3940301A1 DE19893940301 DE3940301A DE3940301A1 DE 3940301 A1 DE3940301 A1 DE 3940301A1 DE 19893940301 DE19893940301 DE 19893940301 DE 3940301 A DE3940301 A DE 3940301A DE 3940301 A1 DE3940301 A1 DE 3940301A1
Authority
DE
Germany
Prior art keywords
active
tread
contact surface
piston ring
depressurised
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Withdrawn
Application number
DE19893940301
Other languages
German (de)
Inventor
Friedhelm Stecher
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 DE19893940301 priority Critical patent/DE3940301A1/en
Publication of DE3940301A1 publication Critical patent/DE3940301A1/en
Withdrawn legal-status Critical Current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
    • F16J9/00Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
    • 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
    • F16J9/00Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
    • F16J9/12Details

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The piston ring with a gas-seal has an underside which is depressurised inwards so that the bearing or pressurised active side corresponds to the maximum active contact surface level. The active contact surface level is high enough for there to be no over-twisting with 75 percent stroke height in the compacting stroke with a nominal rotational speed. The contact surface part above the active range is removed permanently from resting against the cylindrical contact surface. USE/ADVANTAGE - The cross section of the ring is relatively large for applying tangential force, for reducing wear.

Description

Die meisten Kolbenringe der 1. Nut und manchmal auch der 2. Nut entwickeln durch Verschleiß bestimmte Formen der Flanken und Laufflächen, die auf Twistbewegungen des Ringes in der Nut zurückzuführen sind. Dadurch durchläuft ein Ring im Laufe der Zeit verschiedene Bewegungsformen, für die er ursprünglich nicht ausgelegt war. Bestimmte Formen haben sich für die Funktion und die Lebensdauer als gut und andere wiederum als schlecht herausgestellt.Most piston rings of the 1st groove and sometimes also the 2. Develop certain forms of wear due to wear Flanks and treads that twist on the Ring in the groove. This goes through a ring different forms of movement over time, for which it was not originally designed. Certain Shapes have been designed for function and lifespan as good and others as bad.

Aufgabe der Erfindung ist es, den Ring schon im Neuzustand auf eine gute Kinematik einzustellen und durch zusätzliche konstruktive Maßnahmen ein verschleißbedingtes Abgleiten in schlechte kinematische Verhältnisse zu verhindern.The object of the invention is to make the ring as new adjust to good kinematics and additional constructive measures a wear-related sliding to prevent in bad kinematic conditions.

Erfindungsgemäß wurde die Aufgabe dadurch gelöst, daß für einen von Anfang an freischwingenden Ring (Freischwinger) die aktiv an der Abdichtung beteiligten Flächen der Flanke und Lauffläche auf eine für eine gute Kinematik notwendige Größe begrenzt und diese aktiven Flächen aufeinander abge­ stimmt werden.According to the invention the object was achieved in that for a free-swinging ring from the start (cantilever) the areas of the flank actively involved in the sealing and tread on a necessary for good kinematics Limited size and these active areas matched to each other be true.

Der Erfindung liegt die Erkenntnis zugrunde, daß das Mo­ mentengleichgewicht des Ringquerschnittes insbesondere durch eine Vergrößerung der aktiven Breite der unteren Ringflanke infolge Verschleiß stark verändert wird. The invention is based on the knowledge that the Mo mental balance of the ring cross-section in particular by increasing the active width of the lower one Ring flank is changed significantly due to wear.  

Als günstig für eine gute Funktion ohne Ölabstreifende Störung hat sich ein Verhältnis der aktiven Laufflächen­ höhe zur aktiven Flankenbreite der Unterflanke von etwa 1,0 bis 1,3 erwiesen. Wird das Verhältnis größer, so be­ steht die Gefahr der Ausbildung einer zu steilen Lauf­ fläche durch Verschleiß. Wird das Verhältnis dagegen wesentlich kleiner, so besteht die Gefahr des Über­ twistens im oberen Totpunkt unter Gasdruck. Beides ist unerwünscht und bedeutet Störungen im Ölverbrauch und Verschleiß.As cheap for a good function without oil scrapers Disorder has a ratio of active treads height to the active flank width of the lower flank of about Proved 1.0 to 1.3. If the ratio increases, so be there is a risk of training a too steep run surface due to wear. The relationship is against it much smaller, there is a risk of over twists at top dead center under gas pressure. It is both undesirable and means disruptions in oil consumption and Wear.

Durch den erfindungsgemäßen Vorschlag, die aktiven Flächen unabhängig vom vorgegebenen Ringquerschnitt aus­ zulegen, besteht die Möglichkeit der individuellen Ein­ stellung des Kolbenringes auf die Betriebsbedingungen des jeweiligen Motors schon bei der Fertigung.Through the proposal according to the invention, the active Areas regardless of the specified ring cross-section there is the possibility of individual on position of the piston ring on the operating conditions of the respective engine during production.

Die Größe des aktiven Bereiches ist abhängig von der maximalen Massenbeschleunigung und der dabei zur Ver­ fügung stehenden Gasdruckdifferenz, um den Ring ent­ gegen der Massenkraft an der Unterflanke zu halten. Die absolute Breite der aktiven Flankenfläche errech­ net sich aus der Massenkraft, dividiert durch die zur Verfügung stehende Druckdifferenz, plus 20%.The size of the active area depends on the maximum mass acceleration and the ver standing gas pressure difference to the ring ent against the mass force on the lower flank. Calculate the absolute width of the active flank area is the mass force divided by the Available pressure difference, plus 20%.

Die Skizze zeigt einen Ringquerschnitt eines nach dieser Erfindung ausgelegten Ringes, bei dem die aktive Flankenbreite (1) durch eine innere inaktive Fase (2) von ca. 5° auf eine Flankenbreite von 20% der Gesamtbreite verkleinert wurde. Der aktive Teil der Lauffläche (3) beträgt nur 50% der Gesamthöhe des Ringes, wobei der inaktive Teil durch eine Fase von 10° zurückgenommen ist.The sketch shows a ring cross section of a ring designed according to this invention, in which the active flank width ( 1 ) has been reduced from approximately 5 ° to an flank width of 20% of the total width by an inner inactive chamfer ( 2 ). The active part of the tread ( 3 ) is only 50% of the total height of the ring, the inactive part being reduced by a chamfer of 10 °.

Das Verhältnis von aktiver Laufflächenhöhe zu aktiver Flankenbreite beträgt in diesem Fall 1,25.The ratio of active tread height to active Flank width in this case is 1.25.

Claims (3)

1. Kolbenring zur Gasabdichtung, dadurch gekennzeichnet, daß die Unterflanke nach innen so weit durch andere Maßnahmen druckentlastet wird, daß die tragende bzw. druckbelastete aktive Flankenbreite, von der Lauf­ fläche aus gerechnet, maximal der maximalen aktiven Laufflächenhöhe entspricht und diese aktive Lauf­ flächenhöhe nur so hoch ist, daß sich bei 75% Hub­ höhe im Verdichtungshub bei Nenndrehzahl noch gerade kein Übertwisten ergibt und der oberhalb des aktiven Bereiches liegende Laufflächenteil dauerhaft der An­ lage an der Zylinderlauffläche entzogen ist.1. Piston ring for gas sealing, characterized in that the lower flank is relieved to the inside by other measures to such an extent that the load-bearing or pressure-loaded active flank width, calculated from the tread, corresponds at most to the maximum active tread height and this active running surface height only is so high that at 75% stroke height in the compression stroke at nominal speed just does not result in overturning and the tread part above the active area is permanently removed from the position on the cylinder tread. 2. Kolbenring nach Anspruch 1, dadurch gekennzeichnet, daß der aktive Laufflächenteil wie sonst die gesamte Lauffläche symmetrisch oder asymmetrisch ballig be­ arbeitet ist.2. Piston ring according to claim 1, characterized in that the active tread part as usual the whole Tread symmetrically or asymmetrically crowned is working. 3. Kolbenring nach Anspruch 1 und 2, dadurch gekenn­ zeichnet, daß die dauerhafte Rücknahme des inaktiven Bereiches von Lauffläche und Flanke durch eine Fase oder einen Absatz geschieht.3. Piston ring according to claim 1 and 2, characterized records that the permanent withdrawal of the inactive Area of the tread and flank by a chamfer or a paragraph happens.
DE19893940301 1989-12-06 1989-12-06 Piston ring with gas seal - has depressurised underside, with active contact surface and cylindrical surface Withdrawn DE3940301A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19893940301 DE3940301A1 (en) 1989-12-06 1989-12-06 Piston ring with gas seal - has depressurised underside, with active contact surface and cylindrical surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893940301 DE3940301A1 (en) 1989-12-06 1989-12-06 Piston ring with gas seal - has depressurised underside, with active contact surface and cylindrical surface

Publications (1)

Publication Number Publication Date
DE3940301A1 true DE3940301A1 (en) 1991-06-13

Family

ID=6394902

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19893940301 Withdrawn DE3940301A1 (en) 1989-12-06 1989-12-06 Piston ring with gas seal - has depressurised underside, with active contact surface and cylindrical surface

Country Status (1)

Country Link
DE (1) DE3940301A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0672849A1 (en) * 1994-03-14 1995-09-20 Ford Motor Company Limited Piston sealing assembly
DE4429649A1 (en) * 1994-08-20 1996-02-22 Ae Goetze Gmbh Piston ring with rounded area of contact with cylinder wall
DE19906690A1 (en) * 1999-02-18 2000-08-24 Schaeffler Waelzlager Ohg Piston sealing ring for a hydraulic pump or motor is of a ferrous material with a structured wall thickness:outer dia ratio to give a low cost component with a long life giving a low leakage and constant friction
DE19944453C1 (en) * 1999-09-16 2001-01-25 Federal Mogul Burscheid Gmbh Piston ring for the top groove at the piston towards the cylinder combustion zone has a structured break in the cross section to prevent twisting with improved oil scraping at the cylinder walls
EP2045488A1 (en) * 2007-10-05 2009-04-08 Mitsubishi Heavy Industries, Ltd. Piston ring of reciprocating engine
DE102012013803A1 (en) 2012-04-19 2013-10-24 Federal-Mogul Burscheid Gmbh Piston ring for combustion engine, has transition area forming sharp striking edge in contact area from lower flank area, while curved shell surface extending in direction of upper flank area is protruded from striking edge
CN106662246A (en) * 2014-06-27 2017-05-10 株式会社理研 Piston ring

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0672849A1 (en) * 1994-03-14 1995-09-20 Ford Motor Company Limited Piston sealing assembly
DE4429649A1 (en) * 1994-08-20 1996-02-22 Ae Goetze Gmbh Piston ring with rounded area of contact with cylinder wall
DE4429649C2 (en) * 1994-08-20 1998-02-19 Ae Goetze Gmbh Piston ring
DE19906690A1 (en) * 1999-02-18 2000-08-24 Schaeffler Waelzlager Ohg Piston sealing ring for a hydraulic pump or motor is of a ferrous material with a structured wall thickness:outer dia ratio to give a low cost component with a long life giving a low leakage and constant friction
DE19906690B4 (en) * 1999-02-18 2010-04-01 Schaeffler Kg seal
US6470792B1 (en) 1999-09-16 2002-10-29 Federal-Mogul Burscheid Gmbh Combined compression and oil scraper piston ring
EP1085242A2 (en) 1999-09-16 2001-03-21 Federal-Mogul Burscheid GmbH Piston ring
DE19944453C1 (en) * 1999-09-16 2001-01-25 Federal Mogul Burscheid Gmbh Piston ring for the top groove at the piston towards the cylinder combustion zone has a structured break in the cross section to prevent twisting with improved oil scraping at the cylinder walls
EP2045488A1 (en) * 2007-10-05 2009-04-08 Mitsubishi Heavy Industries, Ltd. Piston ring of reciprocating engine
CN101403348B (en) * 2007-10-05 2011-05-25 三菱重工业株式会社 Piston ring of reciprocating engine
DE102012013803A1 (en) 2012-04-19 2013-10-24 Federal-Mogul Burscheid Gmbh Piston ring for combustion engine, has transition area forming sharp striking edge in contact area from lower flank area, while curved shell surface extending in direction of upper flank area is protruded from striking edge
CN106662246A (en) * 2014-06-27 2017-05-10 株式会社理研 Piston ring
CN106662246B (en) * 2014-06-27 2018-09-14 株式会社理研 Piston ring

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