US3489125A - Rotor for a rotary piston engine - Google Patents

Rotor for a rotary piston engine Download PDF

Info

Publication number
US3489125A
US3489125A US731560A US3489125DA US3489125A US 3489125 A US3489125 A US 3489125A US 731560 A US731560 A US 731560A US 3489125D A US3489125D A US 3489125DA US 3489125 A US3489125 A US 3489125A
Authority
US
United States
Prior art keywords
rotor
rotary piston
flanks
slots
piston engine
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
US731560A
Other languages
English (en)
Inventor
Fritz Fend
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.)
ZF Sachs AG
Original Assignee
Fichtel and Sachs 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 Fichtel and Sachs AG filed Critical Fichtel and Sachs AG
Application granted granted Critical
Publication of US3489125A publication Critical patent/US3489125A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B55/00—Internal-combustion aspects of rotary pistons; Outer members for co-operation with rotary pistons
    • F02B55/02—Pistons

Definitions

  • the rotor body of a rotary-pistonvengine is a lightmetal pressure casting in which the central opening, radial slots for apex vanes, grooves in the end walls for arc-shaped segmental rings, and axial bores for rivets are formed in the casting operation.
  • Annular steel plates are partly recessed in the end walls and fastened by the afore-mentioned rivets. They project partly into the central opening to secure the rotor on an eccentric received in the opening and carry a gear rim and a cylindrical supporting face respectively.
  • This invention relates to improvements in rotarypiston engines, and particularly to an improved rotor for such engines.
  • the orbiting rotor of the known engine has a central opening and three circumferential flanks angularly offset about the axis of the rotor between two opposite end faces of the same which are transverse of the axis.
  • the flanks meet in axial apex edges in which slots for radial sliding vanes are formed. Plugs on the ends of the vanes are received in enlarged end portions of the slots. Grooves in the end faces connect respective pairs of the enlarged end portions and normally receive arc-shaped segmental piston rings.
  • the rotors employed heretofore are rather complex pieces of machinery which are manufactured at relatively high cost, the several flanks, slots, grooves, and openings being formed by machining from solid metal.
  • the object of the invention is the provision of a rotor for a rotary piston engine which can be mass-produced at low cost and requires but a minimum of machining operations.
  • the invention provides a rotor of the type described whose main portion is a unitary, pressure-cast body of light metal formed with the slots and grooves in the casting operation. Respective face portions of the body constitute the rotor flanks and annular portions of the rotor and walls contiguously adjacent the flanks.
  • FIG. 1 is a fragmentary axial end view of a rotor of the invention.
  • FIG. 2 shows the rotor of FIG. 1 in section on the line II-II.
  • the illustrated rotor is approximately triangular and has a central, axial opening. Its main part is a body 1 of diecast aluminum alloy which constitutes the three outwardly bulging flanks of the rotor and the annular portions of its radial end walls 3, 4 contiguously adjacent the flanks. Where the flanks meet, they define apex edges in which slots 5 are formed in the diecasting operation.
  • the body 1 has two annular axial recesses 7 of identical size and shape about the orifices of the central rotor opening in the two end walls.
  • Three axial bores 8 which terminate in the two recesses 7 and shallow pockets 9 in the three flanks of the rotor, which control the shape of the combustion chambers in the engine, are also present in the cast body 1 when it emerges from its mold and do not require secondary machining.
  • Some finishing by mechanical operations is normally required on the cylindrical wall 10 of the body 1 which radially bounds the central rotor opening and provides a bearing face for a non-illustrated eccentric.
  • the orifices of the central opening in the side walls 3, 4 are marginally obstructed by projecting inner portions of two flat, annular steel plates 11, 13 whose outer portions are conformingly received in the recesses 7.
  • the inwardly projecting portion 12 of the plate 11 forms a gear rim whose teeth are directed toward the rotor axis and mesh with a non-illustrating pinion on the engine casing in the usual manner during operation of the engine.
  • the inner cylindrical face 14 of the plate 13 requires machining to a precisely circular configuration if it is to serve as a guide and support for the rotor in cooperation with a non-illustrated element on the engine casing.
  • the two projecting inner rims of the plates 11, 13 axially confine the conventional eccentric, and thereby help to maintain the proper axial position of the rotor.
  • the plates 11, 13 are stampings of identical outer configuration.
  • the teeth of the gear rim 12 may be formed in the stamping operation or they may be broached after stamping.
  • the plates are attached to the cast rotor body 1 by three tubular rivets 15 which are received in the three bores 8 respectively and pass through aligned apertures 17 in lugs 16 of the plates 11, 13.
  • the lugs 16 are ofiset on each plate, and project from the main portion of the associated plate toward the apexes of the rotor.
  • FIG. 1 shows the provisionally assembled rotor without the rivets 15.
  • the rivets are inserted and upset in the manner shown in FIG. 2 only after the rotor has been installed on the eccentric.
  • the rotor shown in the drawing thus consists of a l ight metal pressure casting and of two flat stamped steel plates.
  • the body 1 is formed with the grooves 2, the slots 5 having enlarged end portions 6, the annular recesses 7, the bores 8 for the rivets 17, and the pockets 9. It needs machining only on the cylindrical bearing face 10.
  • the plate 11 requires little finishing, if any, if the teeth of the integral gear rim 12 are also stamped.
  • the inner cylindrical face 14 of the plate 13 must be given a smooth and precisely cylindrical shape, but this is not needed if the rotor is'not guided on this face.
  • the rotor proper of the invention thus can be produced at low cost since it requires very little machining.
  • a rotor for a rotary piston engine having an axis and a central axial opening adapted to receive an eccentric, two opposite end faces transverse of said axis, a plurality of angularly offset circumferential flanks axially extending between said end faces, each flank defining an axial apex edge of said rotor with each circumferentially adjacent flank, each apex edge being formed with a slot extending between said end faces and inward of the rotor in an approximately radial direction, the end portions of each slot adjacent said end faces being enlarged, said end faces being each formed with a plurality of grooves, each groove connecting respective enlarged end portions of two of said slots, the improvement which comprises:
  • said central opening having an orifice in each of said end walls, one of said annular end wall portions being formed with an axial recess about the orifice of said opening in said one end wall, an annular steel plate, a portion of said plate being conformingly received in said recess, and a gear rim on said plate having a plurality of teeth directed toward said axis.
  • said body being formed with a plurality of axial bores therethrough terminating in said recess and angularly spaced from each other relative to said axis
  • said plate being formed with a plurality of apertures respectively axially aligned with said bores, and a rivet received in each bore and the aligned aperture, and fastening said plate to said body.
  • the other annular end wall portion being formed with an axial recess about the orifice of said opening in said other end wall, another annular steel plate, a portion of said other plate being conformingly received in the last-mentioned recess, said other plate having a cylindrical inner face about said axis.
  • said body being formed with a plurality of axial bores therethrough terminating in said recesses and angularly spaced from each other relative to said axis, said plates being each formed with a plurality of apertures respectively aligned with said bores, and a rivet received in each bore and the aligned apertures of said plates, and fastening said plates to said body.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
US731560A 1967-06-03 1968-05-23 Rotor for a rotary piston engine Expired - Lifetime US3489125A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF0052598 1967-06-03

Publications (1)

Publication Number Publication Date
US3489125A true US3489125A (en) 1970-01-13

Family

ID=7105579

Family Applications (1)

Application Number Title Priority Date Filing Date
US731560A Expired - Lifetime US3489125A (en) 1967-06-03 1968-05-23 Rotor for a rotary piston engine

Country Status (2)

Country Link
US (1) US3489125A (de)
DE (1) DE1551107A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3652190A (en) * 1969-07-15 1972-03-28 Fichtel & Sachs Ag Rotor for a rotary internal combustion engine
US3655302A (en) * 1970-04-02 1972-04-11 Curtiss Wright Corp Rotor and gear assembly for rotary mechanisms
US3799706A (en) * 1972-12-27 1974-03-26 Gen Motors Corp Rotor assembly for a rotary machine
US3829944A (en) * 1971-11-16 1974-08-20 Rudi Nsu Auto Union Ag Rotor for rotary combustion engine and method of making the same
US3907464A (en) * 1974-09-03 1975-09-23 Gen Motors Corp Rotary engine rotor
US4253809A (en) * 1978-05-22 1981-03-03 Diesel Kiki Co., Ltd. Vane compressor with rotor having metallic base and vane slots and a periphery of lower specific gravity

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3318515A (en) * 1965-06-07 1967-05-09 Curtiss Wright Corp Wear resistant construction for rotary mechanisms
US3323713A (en) * 1964-12-10 1967-06-06 Nsu Motorenwerke Ag Sealing arrangement for rotary mechanisms
US3400939A (en) * 1966-01-03 1968-09-10 Curtiss Wright Corp Oil seal construction for rotary engines
US3400604A (en) * 1966-11-25 1968-09-10 Curtiss Wright Corp Rotor and gear assembly for rotary mechanisms

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3323713A (en) * 1964-12-10 1967-06-06 Nsu Motorenwerke Ag Sealing arrangement for rotary mechanisms
US3318515A (en) * 1965-06-07 1967-05-09 Curtiss Wright Corp Wear resistant construction for rotary mechanisms
US3400939A (en) * 1966-01-03 1968-09-10 Curtiss Wright Corp Oil seal construction for rotary engines
US3400604A (en) * 1966-11-25 1968-09-10 Curtiss Wright Corp Rotor and gear assembly for rotary mechanisms

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3652190A (en) * 1969-07-15 1972-03-28 Fichtel & Sachs Ag Rotor for a rotary internal combustion engine
US3655302A (en) * 1970-04-02 1972-04-11 Curtiss Wright Corp Rotor and gear assembly for rotary mechanisms
US3829944A (en) * 1971-11-16 1974-08-20 Rudi Nsu Auto Union Ag Rotor for rotary combustion engine and method of making the same
US3799706A (en) * 1972-12-27 1974-03-26 Gen Motors Corp Rotor assembly for a rotary machine
US3907464A (en) * 1974-09-03 1975-09-23 Gen Motors Corp Rotary engine rotor
US4253809A (en) * 1978-05-22 1981-03-03 Diesel Kiki Co., Ltd. Vane compressor with rotor having metallic base and vane slots and a periphery of lower specific gravity

Also Published As

Publication number Publication date
DE1551107A1 (de) 1970-04-16

Similar Documents

Publication Publication Date Title
JP5136628B2 (ja) バルブタイミング調整装置
US20140234150A1 (en) Vane pump
US4515513A (en) Rotary compressor with inner and outer cylinders and axial insert type discharge valves
US3489125A (en) Rotor for a rotary piston engine
US3103893A (en) Variable displacement engine
US2955800A (en) Turbomachine stator assembly
US4842500A (en) Vane pump with positioning pins for cam ring
US10371019B2 (en) Valve timing control device for internal combustion engine
US4464101A (en) Seizure-free, highly fluid tight and lightweight vane compressor
US3180562A (en) Seals for rotary mechanisms
US3469505A (en) Polygonal piston for a rotary piston internal combustion engine
CN110023597B (zh) 气门正时调整装置及其制造方法
US6311656B1 (en) Valve timing control apparatus for internal combustion engine
US3300124A (en) Seal construction for rotry mechanisms
US1777501A (en) Means for locating piston rings
US3932075A (en) Rotor and sealing grid for rotary engines
US3791235A (en) Split intermediate housing section for multi-rotor rotary mechanism
RU2694948C2 (ru) Ротор роторного двигателя
CN115142978A (zh) 用于内燃机的活塞及其制造方法
US2863707A (en) Piston, particularly for internal combustion engines
US3236566A (en) Hydraulic pump
US3500797A (en) Reinforced rotary piston
US5451149A (en) Rotor cooling of rotary engines
US4125347A (en) Rotary piston engine having reinforced side housings
US4218200A (en) Rotor cooling means for rotary piston engines