US3366317A - Rotary piston internal combustion engine, especially circular piston internal combustion engine - Google Patents

Rotary piston internal combustion engine, especially circular piston internal combustion engine Download PDF

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Publication number
US3366317A
US3366317A US634342A US63434267A US3366317A US 3366317 A US3366317 A US 3366317A US 634342 A US634342 A US 634342A US 63434267 A US63434267 A US 63434267A US 3366317 A US3366317 A US 3366317A
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US
United States
Prior art keywords
internal combustion
combustion engine
piston internal
housing
inserts
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
US634342A
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English (en)
Inventor
Keylwert Johann
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz 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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Application granted granted Critical
Publication of US3366317A publication Critical patent/US3366317A/en
Priority to SE05226/68A priority Critical patent/SE336756B/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

Definitions

  • the present invention relates to a rotary piston internal combustion engine, especially circular piston internal combustion engine, in which the piston profile is formed by a trochoid while the adjacent housing surface is formed by an outer enveloping curve of said trochoid.
  • the invention is characterized primarily, in that insert means carrying the sealing strip are provided in the lobe sections on the inside of said housing, said insert means being formed by longitudinal members having an outer cylindrical peripheral surface portion inserted in the housing and carrying the sealing strip means.
  • the present invention relates to a rotary piston internal combustion engine, especially circular piston internal combustion engine, in which the piston profile is determined by a trochoide, especially epitrochoide, and accordingly the housing profile follows the outer enveloping curve of the trochoide, while radial seals are arranged in the lobe areas of the inner wall surface of the housing.
  • Still another object of this invention consists in providing an automatic cooling for the grooves which receive the sealing strips.
  • a still further object of this invention consists in so arranging the sealing strip that it can easily be removed without disassembling the engine.
  • FIG. 1 is a partial cross section through a circular piston internal combustion engine according to the present invention.
  • FIG. 2 is a partial longitudinal section through the circular piston internal combustion engine of FIG. 1.
  • the rotary piston internal combustion engine according to the present invention is characterized primarily in that for purposes of guiding the sealing strips in the lobe area of the housing, there are provided inserts of a crosssectional shape which can easily be realized, while the arrangement is such that said inserts are secured against turning and displacement.
  • the invention is furthermore characterized in that the cross-sectional axis of said inserts is located in the radial plane through the center of the sealing strips 'while a portion of the crosssection within the range of the piston width is cut off in conformity with the outer enveloping curve.
  • cooling passages are provided in the inserts at both sides of the sealing strip. These cooling passages receive the cooling medium through correspondingly bored screws for connecting the inserts and are also able to discharge the cooling medium through the same passages. If the lubricant for the engine also serves as cooling medium for the inserts, lubricating bores may be pro vided in the inserts which lead from the cooling passages in the inserts to the sealing strips.
  • the inserts according to the present invention may, according to a further development of the invention advantageously be so designed that they form a connection to the end face seals.
  • the inserts extend toward both sides beyond the mantle and extend into the side walls with full cylindrical cross section.
  • the ends of the inserts may serve as connecting means between the end face seals arranged in the side walls.
  • the circular piston internal combustion engine shown therein comprises a piston 1 movable in a housing 2, the profile of said piston being determined by an epitrochoid. Accordingly, the profile of the housing 2 follows the outer enveloping curve of the epitrochoide.
  • cylindrical openings 3 which are open toward the interior of the housing and the axes of which are located with regard to the engine axis outside a line which connects the intersecting edges 4 of the cylindrical opening 3 on the inner wall surface 5.
  • inserts 7 are inserted into said cylindrical openings 3. The sealing strips 6 are pressed by spring elements 8 against the piston 1.
  • cooling passages 8a are provided in the inserts 7 which by means of passages 9 communicate with the feeding and discharge conduit means 10.
  • the feeding of the lubricant is effected according to the drawing from the outer periphery of the engine. However, it may also be advantageous to feed the cooling means through the end face of housing 2 axially with regard to the inserts.
  • the drawing shows one side only of the circular piston internal combustion engine. This side may serve for feeding or withdrawing the cooling medium. Accordingly, on the other side of the internal combustion engine there will be the withdrawal or the feeding conduit means for the cooling medium. However, it is also possible to provide the feeding conduit as well as the withdrawing conduit for the cooling medium on one and the same side. In such an instance the cooling passages are short-circuited on one side of the circular piston internal combustion engine and on the other side are separately connected to the feeding conduit for the cooling medium and the withdrawing conduit for the cooling medium.
  • the lubrication of the sealing strips 6 is effected by bores 11 and 12. If the cooling medium simultaneously serves for lubricating the sealing strips, the lubrication of the sealing strips may also be effected through lubricating bores 13.
  • the feeding and withdrawing conduits 10 for the cooling medium are advantageously provided in hollow screws which at the same time connect the inserts 7 to the housing.
  • the inserts 7 For purposes of permitting a heat expansion of the inserts, it is advantageous that they are secured against axial displacement at one end only. This can be effected independently of the conduit means for the cooling medium by a connecting screw 14.
  • FIG. 2 furthermore shows that the inserts 7 with full cylindrical cross section extend into the side walls 15 of the housing 2. These ends of the inserts may then serve 7 through said passage means.
  • a rotary piston internal combustion engine especially a circular piston internal combustion engine, which comprises: a piston having a profile determined by a trochoid, a housing surrounding said piston, and having its inner profile following the outer enveloping curve of the said trochoid so as to have inner corner portions, insert means respectively located in said corner portions and provided with grooves extending in the direction of the axis of rotation of said piston, connecting means supported by said housing for securing said insert means against turning and displacement in said housing, sealing strip means respectively inserted in said grooves for sealing engagement with the periphery of said piston, and spring means continuously urging said sealing strip means into and holding the same in sealing engagement with said piston.
  • said housing comprises side walls on opposite sides of said piston, and in which at least one of said side walls is provided with passage means for receiving the respective adjacent end of said insert means.
  • said housing also comprises side walls located laterally of said piston, and which also comprises additional screw means for connecting the insert means to an area close to said side walls.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
US634342A 1966-04-30 1967-04-27 Rotary piston internal combustion engine, especially circular piston internal combustion engine Expired - Lifetime US3366317A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE05226/68A SE336756B (de) 1967-04-27 1968-04-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK0059133 1966-04-30

Publications (1)

Publication Number Publication Date
US3366317A true US3366317A (en) 1968-01-30

Family

ID=7229012

Family Applications (1)

Application Number Title Priority Date Filing Date
US634342A Expired - Lifetime US3366317A (en) 1966-04-30 1967-04-27 Rotary piston internal combustion engine, especially circular piston internal combustion engine

Country Status (5)

Country Link
US (1) US3366317A (de)
AT (1) AT289464B (de)
DE (1) DE1526395A1 (de)
GB (1) GB1160170A (de)
SE (1) SE325439B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3799709A (en) * 1971-06-08 1974-03-26 Schmidt K Gmbh Radial seal for rotary engine pistons
US3885897A (en) * 1972-08-16 1975-05-27 Dornier System Gmbh Lubricating device for radial sealing strips of inner-axial rotary piston engines of trochoidal construction with sliding engagement
US3990819A (en) * 1975-09-26 1976-11-09 Caterpillar Tractor Co. Seals for rotary mechanisms
US4008016A (en) * 1975-06-02 1977-02-15 Caterpillar Tractor Co. Oil cooled seal for rotary engine
US4026612A (en) * 1976-03-22 1977-05-31 Caterpillar Tractor Co. Lubrication of seals in rotary mechanisms
US4728270A (en) * 1986-10-20 1988-03-01 Trochoid Power Corporation Apparatus and method for replacing apex seals in a rotary device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2067345A1 (en) * 1989-10-04 1991-04-05 Helmuth R. Uebel Rotary piston machine seal
CA2067355A1 (en) * 1989-10-04 1991-04-05 Helmuth R. Uebel Rotary piston machine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3082747A (en) * 1958-01-06 1963-03-26 Borsig Ag Rotary piston engine
US3111884A (en) * 1961-03-25 1963-11-26 Renault Rotors of rotary engines
US3131679A (en) * 1961-01-18 1964-05-05 Renault Rotors of rotary engines
US3175503A (en) * 1961-03-31 1965-03-30 Renault Segmentary sealing blades for rotary engines
US3176909A (en) * 1961-03-11 1965-04-06 Nsu Motorenwerke Ag Sealing structures
US3185386A (en) * 1960-09-20 1965-05-25 Renault Packing devices comprising fixed and movable elements for rotary engines
US3193186A (en) * 1960-09-17 1965-07-06 Renault Packings for rotary engines
US3226013A (en) * 1964-05-04 1965-12-28 Toyota Motor Co Ltd Rotary machine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3082747A (en) * 1958-01-06 1963-03-26 Borsig Ag Rotary piston engine
US3193186A (en) * 1960-09-17 1965-07-06 Renault Packings for rotary engines
US3185386A (en) * 1960-09-20 1965-05-25 Renault Packing devices comprising fixed and movable elements for rotary engines
US3131679A (en) * 1961-01-18 1964-05-05 Renault Rotors of rotary engines
US3176909A (en) * 1961-03-11 1965-04-06 Nsu Motorenwerke Ag Sealing structures
US3111884A (en) * 1961-03-25 1963-11-26 Renault Rotors of rotary engines
US3175503A (en) * 1961-03-31 1965-03-30 Renault Segmentary sealing blades for rotary engines
US3226013A (en) * 1964-05-04 1965-12-28 Toyota Motor Co Ltd Rotary machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3799709A (en) * 1971-06-08 1974-03-26 Schmidt K Gmbh Radial seal for rotary engine pistons
US3885897A (en) * 1972-08-16 1975-05-27 Dornier System Gmbh Lubricating device for radial sealing strips of inner-axial rotary piston engines of trochoidal construction with sliding engagement
US4008016A (en) * 1975-06-02 1977-02-15 Caterpillar Tractor Co. Oil cooled seal for rotary engine
US3990819A (en) * 1975-09-26 1976-11-09 Caterpillar Tractor Co. Seals for rotary mechanisms
US4026612A (en) * 1976-03-22 1977-05-31 Caterpillar Tractor Co. Lubrication of seals in rotary mechanisms
US4728270A (en) * 1986-10-20 1988-03-01 Trochoid Power Corporation Apparatus and method for replacing apex seals in a rotary device

Also Published As

Publication number Publication date
SE325439B (de) 1970-06-29
AT289464B (de) 1971-04-26
DE1526395A1 (de) 1970-04-23
GB1160170A (en) 1969-07-30

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