US3802811A - Rotor for rotary combustion engines - Google Patents

Rotor for rotary combustion engines Download PDF

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Publication number
US3802811A
US3802811A US00339022A US33902273A US3802811A US 3802811 A US3802811 A US 3802811A US 00339022 A US00339022 A US 00339022A US 33902273 A US33902273 A US 33902273A US 3802811 A US3802811 A US 3802811A
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US
United States
Prior art keywords
rotor
axial
armour
grooves
accommodating
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
US00339022A
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English (en)
Inventor
J Steinwart
M Ruf
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
Priority claimed from DE19722211960 external-priority patent/DE2211960C3/de
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3802811A publication Critical patent/US3802811A/en
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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49231—I.C. [internal combustion] engine making
    • Y10T29/49234—Rotary or radial engine making

Definitions

  • ABSTRACT Vrablik Attorney, Agent, or Firml(ane, Dalsimer, Kane, Sullivan and Kurucz [57] ABSTRACT
  • This invention refers to a multi-apex rotor for rotary combustion engines of the trochoidal type which rotor carries at its apexes radially movable sealing strips arranged in radial grooves in the rotor apexes; and at its end faces axially movable sealing strips which are arranged in grooves in the rotor endfaces, the sealing cooperation between the radial and the axial sealing strips being obtained by sealing pins which are axially movably arranged in the rotor end faces.
  • each rotor of a light metal wherein damaging of the side walls of the rotor grooves by the sealing strips is prevented.
  • the wall of each of the bores have recesses which form extension of the grooves in the respective rotor endface accommodating the axial sealing strips.
  • the said recesses are open towards the adjacent rotor endface and have a cross-sectional area larger than the crosssectional area of the grooves in the rotor endfaces.
  • the recesses are also lined by the rotor material up to the width of the grooves in the rotor endfaces.
  • the armour may be manufactured as a precision casting or a continuous casting, and the axial anchoring means can be cut in after thecasting.
  • the armour can also be manufactured by sintering.
  • FIG. 1 is a perspective view of a rotor apex with grooved armour in the form of a precision casting or of a sintered part;
  • FIG. 2 is a plan view of the rotor apex shown in FIG.
  • FIG. 3 is a view similar to FIG. 1 of a rotor apex with grooved armour in the form of a continuous casting.
  • FIGS. 1 and 2 show an apex of a rotor lot a rotary combustion engine of the trochoidal type with grooves armour 2 which is cast or sintered from a wear resistant material such as cast iron, especially austenitic cast iron with lamellar graphite having a coefficient of thermal expansion similarto aluminum alloys.
  • the armour 2 has a substantially U-shaped cross-section and its inner side walls 3 and 4 serve as a guide for a radial seal strip (not shown).
  • the armour 2 extends over the whole axial width of the rotor l and its axial end faces 6 and 7 are flush with the rotor endfaces 8 and 9.
  • the end portions 10 and 11 of the armour 2' are cylindrical and comprise axial bores 12 for accommodating seal pins (not shown).
  • the wall of each bore 12 is provided with recesses 15 and 16 which are continuations of the grooves 13 and 14 provided in the adjacent rotor endface and serve to accommodate axial sealing strips (not shown). These recesses 15 and 16 are open towards the adjacent rotor endface 8 and 9, respectively, and their cross-sectional areas are larger than the cross-sectional area of the grooves 13 and 14.
  • the armours 2 are placed into the casting mold for the rotor 1 prior to the casting process, and when the light metal is cast into the mold it also fills the recesses 15 and 16.
  • the cutting tool works in the light metal over the whole length of the grooves including their extension within the arrnours 2.
  • the light metal provides a liner l7 and 18, respectively, of the recesses 15 and 16.
  • FIG. 3 shows a modification of the armour of FIG. 1 and 2.
  • This armour 2' is manufactured in a continuous casting process whereby its continually extending fins 22, 23 are subdivided by interruptions24 and 25 in order to obtain axial anchoring in the rotor material.
  • the radial anchoring of armour 2 is mainly effected by the cylindrical part 26 extending over the whole length of the armour 2.
  • the armour 2' could also be manufactured by an extrusion process, for instance through the use of f.i. a copper cobalt-beryllium alloy.
  • a multi-apex rotor for rotary combustion engines of the trochoidal type having at its apexes radial grooves for accommodating radially movable sealing strips, and having at its endfaces axial grooves for accommodating axially movable sealing strips as well as axial bores for accommodating sealing pins that form a sealing interconnection between the axial and radial sealing strips, comprises a prefabricated grooved armour having radial and axial anchoring means and made of .a wear-resistant material in each rotor apex, said armour extending over substantially the whole axial width of the rotor and having at each of its axial ends a bore for accommodating a sealing pin, the wall of each bore being provided with recesses which are in continuation of the grooves in the rotor endface for accommodating the axial sealing strips, said recesses being open towards the adjacent rotor endface and having a cross-sectional area larger than said grooves in the rotor endface.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Rotary Pumps (AREA)
US00339022A 1972-03-11 1973-03-07 Rotor for rotary combustion engines Expired - Lifetime US3802811A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722211960 DE2211960C3 (de) 1972-03-11 Mehreckiger Kolben für Rotationskolben-Brennkraftmaschinen in Trochoidenbauart

Publications (1)

Publication Number Publication Date
US3802811A true US3802811A (en) 1974-04-09

Family

ID=5838700

Family Applications (1)

Application Number Title Priority Date Filing Date
US00339022A Expired - Lifetime US3802811A (en) 1972-03-11 1973-03-07 Rotor for rotary combustion engines

Country Status (6)

Country Link
US (1) US3802811A (cs)
JP (1) JPS5636288B2 (cs)
FR (1) FR2176368A5 (cs)
GB (1) GB1378476A (cs)
IL (1) IL41721A (cs)
IT (1) IT979489B (cs)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4059370A (en) * 1976-06-25 1977-11-22 Caterpillar Tractor Co. Rotary engine having low thermal conductivity rotor
US20090142686A1 (en) * 2007-11-30 2009-06-04 Satoshi Kojima Image forming method, toner and image forming apparatus
US20130028777A1 (en) * 2011-07-28 2013-01-31 Eugene Gekht Gas seal arrangement for rotary internal combustion engine
US8967988B2 (en) 2011-07-28 2015-03-03 Pratt & Whitney Canada Corp. Apex and face seals with rotary internal combustion engine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6029556U (ja) * 1983-08-05 1985-02-28 難波　優 多目的空気袋

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4059370A (en) * 1976-06-25 1977-11-22 Caterpillar Tractor Co. Rotary engine having low thermal conductivity rotor
US20090142686A1 (en) * 2007-11-30 2009-06-04 Satoshi Kojima Image forming method, toner and image forming apparatus
US20130028777A1 (en) * 2011-07-28 2013-01-31 Eugene Gekht Gas seal arrangement for rotary internal combustion engine
US8851870B2 (en) * 2011-07-28 2014-10-07 Pratt & Whitney Canada Corp Gas seal arrangement for rotary internal combustion engine
US8967988B2 (en) 2011-07-28 2015-03-03 Pratt & Whitney Canada Corp. Apex and face seals with rotary internal combustion engine
US9850758B2 (en) 2011-07-28 2017-12-26 Pratt & Whitney Canada Corp. Apex and face seals with rotary internal combustion engine

Also Published As

Publication number Publication date
DE2211960A1 (de) 1973-09-20
GB1378476A (en) 1974-12-27
DE2211960B2 (de) 1977-02-24
IT979489B (it) 1974-09-30
JPS5636288B2 (cs) 1981-08-22
FR2176368A5 (cs) 1973-10-26
IL41721A0 (en) 1973-05-31
JPS4912216A (cs) 1974-02-02
IL41721A (en) 1975-02-10

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