US3730655A - Sealing bar for a rotary piston internal combustion engine - Google Patents

Sealing bar for a rotary piston internal combustion engine Download PDF

Info

Publication number
US3730655A
US3730655A US00198134A US3730655DA US3730655A US 3730655 A US3730655 A US 3730655A US 00198134 A US00198134 A US 00198134A US 3730655D A US3730655D A US 3730655DA US 3730655 A US3730655 A US 3730655A
Authority
US
United States
Prior art keywords
sealing bar
slide members
bar according
leg portions
short leg
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
Application number
US00198134A
Other languages
English (en)
Inventor
H Lamm
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
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 Daimler Benz AG filed Critical Daimler Benz AG
Application granted granted Critical
Publication of US3730655A publication Critical patent/US3730655A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F01C19/10—Sealings for working fluids between radially and axially movable parts

Definitions

  • ABSTRACT A sealing bar for a rotary piston internal combustin engine, especially of trochoidal construction, which is arranged radially movably in a piston groove provided with a spring and which sealingly slides with its head portion along a running surface in the housing casing of the internal combustion engine whereby two slide members, preferably constructed plate-shaped, are ar ranged along the longitudinal sides between the sealing bar and the piston groove.
  • the present invention relates to a sealing bar for a rotary piston internal combustion engine, especially of trochoidal construction, which is arranged radially moveably in a piston groove provided with a spring and which with its head portion sealingly slides along a casing contact or running surface in the housing casing of the internal combustion engine.
  • sealing bars which consist of a support and of a wear portion whereby the wear portion constitutes about one third of the entire height, fulfill only partially their purposes because stresses occur on the inside of the sealing bars during the operation due to the differing expansion conditions.
  • the present invention is concerned with the task to avoid the aforementioned disadvantages.
  • the present invention proposes that two sliding members are arranged along the longitudinal side between the sealing bar and piston groove.
  • the sliding members which are constructed plate-shaped, are supported either at the casing contact surface or at the groove bottom of the piston groove.
  • the sealing bar may be constructed mushroom shaped in such a manner that the sliding members are supported at the bottom side of the mushroom head.
  • the sliding members can be constructed L-shaped according to the present invention and may engage with their short legs in a respective recess provided in the longitudinal direction directly above the groove bottom.
  • the short leg portions of the sliding members may be directed toward one another in-
  • the present invention proposes to provide the sliding members either at a side facing the piston groove or at a side facing the sealing bar with a rough surface which may be roughened in any known manner whereas the opposite surface of the sliding member as well as possibly the corresponding counter surface may be fine-finished, for example, polished in any conventional manner.
  • Another object of the present invention resides in a sealing bar for a rotary piston internal combustion engine which fully satisfies all present-day requirements.
  • a further object of the present invention resides in a sealing bar for a rotary piston internal combustion engine which not only fully satisfies all mechanical stress requirements over longer periods of time but can be economically fabricated.
  • a still further object of the present invention resides in a sealing bar for rotary piston internal combustion engines which avoids undesirable stresses on the inside of the sealing bar.
  • Another object of the present invention resides in a sealing bar which greatly improves the lubrication and the operation of the engine.
  • Still another object of the present invention resides in a sealing bar construction for rotary piston internal combustion engines which effectively precludes a jamming of the sealing bar in the piston groove.
  • FIGS. 1 to 5 are, respectively, partial cross-sectional views through five embodiments of a rotary piston internal combustion engine of otherwise conventional construction provided with a sealing bar in accordance with the present invention which is arranged in a piston groove between sliding members.
  • a sealing bar 3 springily supported in a piston groove 1 of a piston 2 is movably arranged in the radial direction between two plate-shaped sliding members 4.
  • These sliding members 4, which abut with their smooth surface 5 at the sealing bar 3 and with their rough surface 6 at the piston groove 1, are supported either at the groove bottom (as illustrated in FIG. 1) or at the casing contact surface 7 of the housing casing 8 of the rotary piston internal combustion engine of otherwise conventional construction.
  • the two surfaces of the piston groove and of the sliding member, which come in contact with one another, may be rough-machined or treated in such a manner that they are somewhat anchored one into the other.
  • the sealing bar 3 according to FIG. 2 is constructed mushroom-shaped.
  • the mushroom head is disposed outside the piston groove 1, against the bottom side of which are supported the sliding members 4 which are also constructed as plates.
  • These slide members 4 carry out stroke movements in unison with the sealing bar 3.
  • the contact surfaces of sealing bar-slide members 4 are roughened and the counter surface of the slide members 4 and the flanks 9 of the piston groove are polished by conventional means.
  • the sealing bar 3 illustrated in FIG. 3 is arranged in a piston groove 1 which is slightly more costly as to construction thereof.
  • the groove bottom is constructed wider than the remaining part of the piston groove 1 in such a manner that at the flanks 9, one recess 10 each is provided directly above the groove bottom, into which engage the L-shaped slide members 4 with their short legs 11.
  • the recesses 10 are so dimensioned in their size that a certain stroke play of the slide members 4 in the piston groove 1 exists.
  • the L-shaped slide members 4 illustrated in FIGS. 4 and 5 are, in contradistinction to the slide members illustrated in FIG. 3, directed toward one another with their short legs 11 whereby the legs 11 form a more or less large slot 1 2.
  • both slide members 4 partake in the entire stroke movement of the sealing bar 3.
  • a sealing bar for a rotary piston internal combustion engine which is arranged radially movable in a piston groove provided with a spring means, and which sealingly slides with its head portion at a casing contact surface in a housing casing of the internal combustion engine, characterized by slide means which are arranged in the longitudinal direction of the sealing bar between the sealing bar and the piston groove.
  • a sealing bar according to claim 1 characterized in that two slide members are provided, of which one each is arranged along a respective longitudinal side of a sealing bar between the latter and the piston groove.
  • a sealing bar according to claim 2 characterized in that the rotary piston internal combustion engine is of trochoidal construction.
  • a sealing bar according to claim 2 characterized in that the slide members are constructed plate-shaped.
  • a sealing bar according to claim 4 characterized in that the slide members are supported at the casing contact surface.
  • a sealing bar according to claim 4 characterized in that the slide members are supported at the groove bottom of the piston groove.
  • a sealing bar according to claim 2 characterized in that the sealing bar is constructed mushroom shaped with its head portion.
  • a sealing bar according to claim 2 characterized in that the slide members are constructed L-shaped.
  • a sealing bar according to claim 9 characterized in that the slide members engage with the short leg portions thereof into recesses extending in the longitudinal direction and arranged directly above the groove bottom.
  • a sealing bar according to claim 9 characterized in that the short leg portions of the slide members are directed against one another in such a manner that they form a slot.
  • a sealing bar according to claim 9 characterized in'that the slide members abut with the short leg portions thereof immovably against the groove bottom.
  • a sealing bar according to claim 9 characterized in that the short leg portions of the slide members abut at the sealing bar under spring pressure.
  • a sealing bar according to claim 2 characterized in that the slide members are provided with a rough surface on a side facing the piston groove.
  • a sealing bar according to claim 2 characterized in that the slide members are roughened at the side facing the sealing bar.
  • a sealing bar according to claim 2 characterized in that the slide members are supported at the casing contact surface.
  • a sealing bar according to claim 2 characterized in that the slide members are supported at the groove bottom of the piston groove.
  • a sealing bar according to claim 2 characterized in that the slide members are supported against the bottom side of a sealing bar head portion.
  • a sealing bar according to claim 2 characterized in that short leg portions of the slide members abut at the sealing bar under spring pressure.
  • a sealing bar according to claim 2 characterized in that the slide members carry out stroke movements substantially in unison with the sealing bar. 7

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Sealing Devices (AREA)
US00198134A 1970-11-14 1971-11-12 Sealing bar for a rotary piston internal combustion engine Expired - Lifetime US3730655A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702056068 DE2056068A1 (de) 1970-11-14 1970-11-14 Dichtleiste für eine Rotationskolben-Brennkraftmaschine

Publications (1)

Publication Number Publication Date
US3730655A true US3730655A (en) 1973-05-01

Family

ID=5788090

Family Applications (1)

Application Number Title Priority Date Filing Date
US00198134A Expired - Lifetime US3730655A (en) 1970-11-14 1971-11-12 Sealing bar for a rotary piston internal combustion engine

Country Status (3)

Country Link
US (1) US3730655A (cg-RX-API-DMAC10.html)
DE (1) DE2056068A1 (cg-RX-API-DMAC10.html)
FR (1) FR2114618A5 (cg-RX-API-DMAC10.html)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844692A (en) * 1973-05-16 1974-10-29 Olin Corp Protective shields for rotary internal combustion engine rotor tip seals
US4079083A (en) * 1975-02-03 1978-03-14 Ciba-Geigy Corporation Vane type orbital engine
US4396365A (en) * 1979-12-11 1983-08-02 Nissan Motor Co., Ltd. Rotary vane type compressor
EP1061267A3 (de) * 1999-06-17 2003-09-17 Bayerische Motoren Werke Aktiengesellschaft Dichtungseinheit für einen Schwenkmotor
US20160160751A1 (en) * 2013-03-15 2016-06-09 Randy Koch Rotary Internal Combustion Engine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3186384A (en) * 1960-06-30 1965-06-01 Goetzewerke Friedrich Goltze A Piston seal for rotary engines
US3194489A (en) * 1963-03-20 1965-07-13 Goetzewerke Radial piston for rotary engines
US3235171A (en) * 1963-08-16 1966-02-15 Goetzewerke Sealing strip for rotary pistons of internal combustion engines
US3280801A (en) * 1963-07-04 1966-10-25 Daimler Benz Ag Rotary piston engine
US3300124A (en) * 1966-04-14 1967-01-24 Curtiss Wright Corp Seal construction for rotry mechanisms
US3301231A (en) * 1964-07-25 1967-01-31 Yanmar Diesel Engine Co Sealing device for rotary piston engines
US3326454A (en) * 1964-05-09 1967-06-20 Renault Sealing segments for rotary engines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3186384A (en) * 1960-06-30 1965-06-01 Goetzewerke Friedrich Goltze A Piston seal for rotary engines
US3194489A (en) * 1963-03-20 1965-07-13 Goetzewerke Radial piston for rotary engines
US3280801A (en) * 1963-07-04 1966-10-25 Daimler Benz Ag Rotary piston engine
US3235171A (en) * 1963-08-16 1966-02-15 Goetzewerke Sealing strip for rotary pistons of internal combustion engines
US3326454A (en) * 1964-05-09 1967-06-20 Renault Sealing segments for rotary engines
US3301231A (en) * 1964-07-25 1967-01-31 Yanmar Diesel Engine Co Sealing device for rotary piston engines
US3300124A (en) * 1966-04-14 1967-01-24 Curtiss Wright Corp Seal construction for rotry mechanisms

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844692A (en) * 1973-05-16 1974-10-29 Olin Corp Protective shields for rotary internal combustion engine rotor tip seals
US4079083A (en) * 1975-02-03 1978-03-14 Ciba-Geigy Corporation Vane type orbital engine
US4396365A (en) * 1979-12-11 1983-08-02 Nissan Motor Co., Ltd. Rotary vane type compressor
EP1061267A3 (de) * 1999-06-17 2003-09-17 Bayerische Motoren Werke Aktiengesellschaft Dichtungseinheit für einen Schwenkmotor
US20160160751A1 (en) * 2013-03-15 2016-06-09 Randy Koch Rotary Internal Combustion Engine
US9828907B2 (en) * 2013-03-15 2017-11-28 Randy Koch Rotary internal combustion engine

Also Published As

Publication number Publication date
DE2056068A1 (de) 1972-05-18
FR2114618A5 (cg-RX-API-DMAC10.html) 1972-06-30

Similar Documents

Publication Publication Date Title
US3193188A (en) Rotor and seal construction for rotary mechanisms
US3176909A (en) Sealing structures
US3730655A (en) Sealing bar for a rotary piston internal combustion engine
US3196849A (en) Apex seal construction for rotary combustion engine
US3194489A (en) Radial piston for rotary engines
GB990709A (en) Radial seal for pistons of rotary piston machines-especially internal combustion engines
US3186384A (en) Piston seal for rotary engines
US3198531A (en) Piston ring
US3400691A (en) Seal construction for rotary combustion engines
US3861838A (en) Rotary piston internal combustion engine, especially of trochoidal construction
US3988081A (en) Grooved compression seals for rotary engines
US3261542A (en) Rotor and seal construction for rotary mechanisms
US3827701A (en) Oil seal for use in rotary piston internal combustion engine
US3130900A (en) Sealing structure
US3300124A (en) Seal construction for rotry mechanisms
ES468273A1 (es) Piston alternativo.
US3485217A (en) Apex seal for rotary combustion engine
US3182641A (en) Rotary piston engine
US3215340A (en) Rotary-piston engine construction
US3229673A (en) Internal combustion engine
ES422298A1 (es) Perfeccionamientos introducidos en motores de combustion interna.
US3545901A (en) Rotor for rotary piston engines
US3139072A (en) Trochoid compensation for rotary engine
US3286699A (en) Radial sealing device for rotary piston engine
SU580393A1 (ru) Компрессионное поршневое кольцо дл двигател внутренного сгорани