US3369740A - 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

Info

Publication number
US3369740A
US3369740A US634966A US63496667A US3369740A US 3369740 A US3369740 A US 3369740A US 634966 A US634966 A US 634966A US 63496667 A US63496667 A US 63496667A US 3369740 A US3369740 A US 3369740A
Authority
US
United States
Prior art keywords
internal combustion
combustion engine
piston
piston internal
section
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
US634966A
Inventor
Abermeth Hubert
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 US3369740A publication Critical patent/US3369740A/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
    • F02B53/00—Internal-combustion aspects of rotary-piston or oscillating-piston engines
    • 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
    • F02B53/00—Internal-combustion aspects of rotary-piston or oscillating-piston engines
    • F02B2053/005—Wankel engines
    • 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
    • F02B2730/00—Internal-combustion engines with pistons rotating or oscillating with relation to the housing
    • F02B2730/01—Internal-combustion engines with pistons rotating or oscillating with relation to the housing with one or more pistons in the form of a disk or rotor rotating with relation to the housing; with annular working chamber
    • F02B2730/018—Internal-combustion engines with pistons rotating or oscillating with relation to the housing with one or more pistons in the form of a disk or rotor rotating with relation to the housing; with annular working chamber with piston rotating around an axis passing through the gravity centre, this piston or the housing rotating at the same time around an axis parallel to the first axis
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a rotary piston internal combustion engine of the type which has an exhaust gas collecting chamber between a side wall of the engine housing and the piston journalled in bearing means in said side wall, while gear means are respectively arranged near said chamber means and are respectively connected to said side wall and said piston for kinematically controlling the piston.
  • the invention is characterized primarily in that the said bearing means and gear means are sealed with regard to said exhaust gas collecting chamber means by a three sectional labyrinth seal with the first section thereof connected to said side wall, the second section thereof connected to said piston, and with the third section arranged between said first and second sections, said first and second sections having circular teeth respectively cooperating with oppositely extending teeth of said third section.
  • 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 trochoid, preferably epitrochoid, while accordingly,
  • the present invention is particularly directed to an engine of the above mentioned type, in which for purposes of realizing the four-stroke cycle method, a piston is employed, the circumference of which has a number of axis-near zones or lobes divisible by 2, said piston between two successive axis-near zones being provided with an inlet-control opening and an outlet-control opening.
  • the inlet and outlet control openings are respectively connected through passages or the like in the piston with inlet and outlet openings provided in the end-faces of the piston and directly or indirectly leading into a sealed collecting chamber of the housing, the seal of which is effected in a contact-free manner through a labyrinth.
  • Such engine is disclosed e.g. in assignees patent application filed Apr. 17, 1967, under Ser. No. 631,459 and based on German application Ser. No. K 59,043 filed Apr. 20, 1966.
  • the collecting chambers may have connected thereto simple conduit means leading toward the outside.
  • the said collecting chambers must be sealed with regard to the transmissions and bearings. This seal causes considerable difiiculties because the sealed elements or parts have to move relative to each other with an eccentricity.
  • FIG. 1 diagrammatically illustrates a section through a portion of a circular piston internal combustion engine provided with a seal according to the present invention.
  • FIG. 2 illustrates on a somewhat larger scale than FIG. 1 the way in which the labyrinth seal according to FIG. 1 operates.
  • the labyrinth seal is characterized primarily in that it comprises three sec tions of which one section is connected to the piston, while a second section is connected to the eccentric shaft, and a third section is connected to the sidewall of the housing, the second or intermediate section with labyrinth forming teeth engaging correspondingly formed counterteeth of the two other sections.
  • FIG. 1 shows a circular piston internal combustion engine with a piston 1, the profile of which is determined by an epitrochoid, while the inner contour of the profile of the housing follows the outer enveloping curve of they epitrochoid.
  • the piston 1 is journalled on an eccentric shaft 3.
  • a pinion 4 connected to the piston 1 and cooperating with a hollow gear 5.
  • the bearing for the eccentric shaft in the housing sidewall 6 is designated with the reference numeral 7.
  • the bearing 7 and the transmission for kinematically controlling the piston are sparated from the exhaust gas controlling chamber -8 by a labyrinth seal.
  • this labyrinth seal comprises two sections of which the section 9 is connected to the piston 1, while the section 10 is connected to the eccentric shaft 3, and the section 11 is connected to the sidewall 6 of the housing 2.
  • the labyrinth teeth 12 form annular members or rings which can easily be produced as bodies of revolution on a lathe or automat.
  • the labyrinth, section 11 forms a single integral piece with the hollow gear 5.
  • the labyrinth sections 9 and 10 are provided with splash rings 13, 14.
  • the cylindrical seat of the labyrinth section 9 is provided with a seal 15.
  • FIG. 2 shows the labyrinth seal on a somewhat larger scale than FIG. 1.
  • the labyrinth section 11' and the hollow gear 5 consist of two pieces.
  • a splash ring 16 is interposed between the hollow gear 5 and the labyrinth section 11.
  • the labyrinth seal permits an easy bridging of the eccentricity of the movable parts relative to the stationary parts. Moreover, all sections of the labyrinth seal are of a simple design so that they can easily be produced on corresponding machine tools.
  • the present invention is, by no means, limited to the illustrated discharge side of a circular piston internal combustion engine, but can also be provided with all of those advantages on the inlet side of the engine. Furthermore, the invention is not limited to a rotary piston internal combustion engine but can also be employed for circular piston internal combustion engines.
  • a rotary piston internal combustion engine especially circular internal combustion engine, with a piston profile determined by a trochoid and with a housing having an inner peripheral profile following the enveloping curve for said trochoid, which includes: side wall means forming part of said housing, bearing means located in said side 3 wall means, an eccentric shaft rotatably journalled in said bearing means and supporting said piston, control means respectively connected to said side wall means and said piston for kinematically controlling the movement of said piston, exhaust gas collecting chamber means arranged be tween-said side wall means and said piston, and labyrinth sealing means interposed between said bearing means and said control means on one hand and said chamber means on'the other hand for sealing said bearing means and said control means with regard to said chamber means, said labyrinth sealing means comprising a first section connected to said side wall means and provided with circular tooth means facing toward said piston, said labyrinth sealing means comprising a second section connected to said piston and provided with circular tooth means facing toward the tooth means of said first section, said labyrin
  • each of said labyrinth sealing sections has a plurality of radially spaced teeth.
  • control means include a gear ring with inner teeth forming an integral part with said first section and also include gear means connected to said piston and meshing with 'said gear ring.
  • control means include a gear ring interposed between and firmly connected to said side wall means and said first section and also include gear means connected to said piston and meshing with the teeth of said gear ring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Description

Feb. 20, 1968 H ABERMETH 3,369,740
ROTARY PISTON INTERNAL COMBUSTION ENGINE, ESPECIALLY CIRCULAR PISTON INTERNAL COMBUSTION ENGINE Filed May 1, 1967 Fig.1
Fig. 2
United States Patent Claims. c1.230-145 ABSTRACT OF THE DISCLOSURE The present invention relates to a rotary piston internal combustion engine of the type which has an exhaust gas collecting chamber between a side wall of the engine housing and the piston journalled in bearing means in said side wall, while gear means are respectively arranged near said chamber means and are respectively connected to said side wall and said piston for kinematically controlling the piston.
The invention is characterized primarily in that the said bearing means and gear means are sealed with regard to said exhaust gas collecting chamber means by a three sectional labyrinth seal with the first section thereof connected to said side wall, the second section thereof connected to said piston, and with the third section arranged between said first and second sections, said first and second sections having circular teeth respectively cooperating with oppositely extending teeth of said third section.
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 trochoid, preferably epitrochoid, while accordingly,
the housing propile follows the outer enveloping curve of the trochoid. The present invention is particularly directed to an engine of the above mentioned type, in which for purposes of realizing the four-stroke cycle method, a piston is employed, the circumference of which has a number of axis-near zones or lobes divisible by 2, said piston between two successive axis-near zones being provided with an inlet-control opening and an outlet-control opening. The inlet and outlet control openings are respectively connected through passages or the like in the piston with inlet and outlet openings provided in the end-faces of the piston and directly or indirectly leading into a sealed collecting chamber of the housing, the seal of which is effected in a contact-free manner through a labyrinth. Such engine is disclosed e.g. in assignees patent application filed Apr. 17, 1967, under Ser. No. 631,459 and based on German application Ser. No. K 59,043 filed Apr. 20, 1966.
With a rotary piston internal combustion engine of the above mentioned type, the collecting chambers may have connected thereto simple conduit means leading toward the outside. However, the said collecting chambers must be sealed with regard to the transmissions and bearings. This seal causes considerable difiiculties because the sealed elements or parts have to move relative to each other with an eccentricity.
It is, therefore, an object of the present invention to provide a rotary piston internal combustion engine, especially circular piston internal combustion engine, with means which will properly seal the transmissions and bearing portions relative to the gas collecting chambers.
It is another object of this invention to provide an engine as set forth in the preceding paragraph in which the seal will be simple in construction and highly effective.
These and other objects and advantages of the in- 3,369,740 Patented Feb. 20, 1968 vention will appear more clearly in the following specification in connection with the accompanying drawing, in which- FIG. 1 diagrammatically illustrates a section through a portion of a circular piston internal combustion engine provided with a seal according to the present invention.
FIG. 2 illustrates on a somewhat larger scale than FIG. 1 the way in which the labyrinth seal according to FIG. 1 operates.
The labyrinth seal, according to the present invention, is characterized primarily in that it comprises three sec tions of which one section is connected to the piston, while a second section is connected to the eccentric shaft, and a third section is connected to the sidewall of the housing, the second or intermediate section with labyrinth forming teeth engaging correspondingly formed counterteeth of the two other sections.
Referring now to the drawings in detail, FIG. 1 shows a circular piston internal combustion engine with a piston 1, the profile of which is determined by an epitrochoid, while the inner contour of the profile of the housing follows the outer enveloping curve of they epitrochoid. The piston 1 is journalled on an eccentric shaft 3. For kinematically controlling the piston 1, there is provided a pinion 4 connected to the piston 1 and cooperating with a hollow gear 5. The bearing for the eccentric shaft in the housing sidewall 6 is designated with the reference numeral 7. The bearing 7 and the transmission for kinematically controlling the piston are sparated from the exhaust gas controlling chamber -8 by a labyrinth seal.
As will be seen from the drawing, this labyrinth seal comprises two sections of which the section 9 is connected to the piston 1, while the section 10 is connected to the eccentric shaft 3, and the section 11 is connected to the sidewall 6 of the housing 2. With this arrangement of the labyrinth sections, the labyrinth teeth 12 form annular members or rings which can easily be produced as bodies of revolution on a lathe or automat. According to the embodiment shown in FIG. 1, the labyrinth, section 11 forms a single integral piece with the hollow gear 5. For purposes of improving the sealing effected, the labyrinth sections 9 and 10 are provided with splash rings 13, 14. Moreover, the cylindrical seat of the labyrinth section 9 is provided with a seal 15.
The operation of the labyrinth seal is best seen from FIG. 2, which shows the labyrinth seal on a somewhat larger scale than FIG. 1. However, in contrast to FIG. 1, the labyrinth section 11' and the hollow gear 5 consist of two pieces. Furthermore, a splash ring 16 is interposed between the hollow gear 5 and the labyrinth section 11.
As will be evident from the above, the labyrinth seal, according to the present invention, permits an easy bridging of the eccentricity of the movable parts relative to the stationary parts. Moreover, all sections of the labyrinth seal are of a simple design so that they can easily be produced on corresponding machine tools.
It is, of course, to be understood that the present invention is, by no means, limited to the illustrated discharge side of a circular piston internal combustion engine, but can also be provided with all of those advantages on the inlet side of the engine. Furthermore, the invention is not limited to a rotary piston internal combustion engine but can also be employed for circular piston internal combustion engines.
What I claim is:
1. A rotary piston internal combustion engine, especially circular internal combustion engine, with a piston profile determined by a trochoid and with a housing having an inner peripheral profile following the enveloping curve for said trochoid, which includes: side wall means forming part of said housing, bearing means located in said side 3 wall means, an eccentric shaft rotatably journalled in said bearing means and supporting said piston, control means respectively connected to said side wall means and said piston for kinematically controlling the movement of said piston, exhaust gas collecting chamber means arranged be tween-said side wall means and said piston, and labyrinth sealing means interposed between said bearing means and said control means on one hand and said chamber means on'the other hand for sealing said bearing means and said control means with regard to said chamber means, said labyrinth sealing means comprising a first section connected to said side wall means and provided with circular tooth means facing toward said piston, said labyrinth sealing means comprising a second section connected to said piston and provided with circular tooth means facing toward the tooth means of said first section, said labyrinth sealing means also comprising a third section connected to said eccentric shaft and having oppositely directed circular tooth means interposed between said first and second sections and in respective sealing arrangement with the tooth means thereof.
2. An engine-according to claim 1, in which each of said labyrinth sealing sections has a plurality of radially spaced teeth.
3. An engine according to claim 2, in which the circular teeth on one side of said third section are radially offset with regard to the circular teeth on the opposite side of said third section.
4. An engine according to claim 1, in which said control means include a gear ring with inner teeth forming an integral part with said first section and also include gear means connected to said piston and meshing with 'said gear ring.
5. An engine according to claim 1, in which said control means include a gear ring interposed between and firmly connected to said side wall means and said first section and also include gear means connected to said piston and meshing with the teeth of said gear ring.
References Cited 5 DONLEY J. STOCKING, Primary Examiner.
WILBUR J. GOODLIN, Examiner.
US634966A 1966-05-04 1967-05-01 Rotary piston internal combustion engine, especially circular piston internal combustion engine Expired - Lifetime US3369740A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK0059159 1966-05-04

Publications (1)

Publication Number Publication Date
US3369740A true US3369740A (en) 1968-02-20

Family

ID=7229021

Family Applications (1)

Application Number Title Priority Date Filing Date
US634966A Expired - Lifetime US3369740A (en) 1966-05-04 1967-05-01 Rotary piston internal combustion engine, especially circular piston internal combustion engine

Country Status (1)

Country Link
US (1) US3369740A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3891357A (en) * 1974-05-03 1975-06-24 Curtiss Wright Corp Rotary mechanism of the type having a planetating rotor
US3904328A (en) * 1971-11-16 1975-09-09 Audi Ag Rotor for rotary combustion engine
US3969049A (en) * 1975-07-17 1976-07-13 Curtiss-Wright Corporation Rotary engine rotor and oil seal configuration
WO1981001169A1 (en) * 1979-10-29 1981-04-30 R Hoffmann Rotary expansion power unit
US4516921A (en) * 1975-01-27 1985-05-14 Vida M. Kemp End seals for a rotary machine
US5232355A (en) * 1991-05-17 1993-08-03 Mitsubishi Denki K.K. Scroll-type fluid apparatus having a labyrinth and oil seals surrounding a scroll shaft

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3111261A (en) * 1960-05-02 1963-11-19 Curtiss Wright Corp Rotor and bearing construction for rotary mechanisms
US3171590A (en) * 1960-12-16 1965-03-02 Curtiss Wright Corp Oil seal construction for rotary combustion engines
US3180563A (en) * 1963-05-13 1965-04-27 Curtiss Wright Corp Oil seal construction for rotary combustion engine
US3249094A (en) * 1962-10-13 1966-05-03 Nsu Motorenwerke Ag Lubricating sealing means for rotary combustion engines
US3323712A (en) * 1965-12-11 1967-06-06 Nsu Motorenwerke Ag Rotary internal combustion engine
US3323713A (en) * 1964-12-10 1967-06-06 Nsu Motorenwerke Ag Sealing arrangement for rotary mechanisms

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3111261A (en) * 1960-05-02 1963-11-19 Curtiss Wright Corp Rotor and bearing construction for rotary mechanisms
US3171590A (en) * 1960-12-16 1965-03-02 Curtiss Wright Corp Oil seal construction for rotary combustion engines
US3249094A (en) * 1962-10-13 1966-05-03 Nsu Motorenwerke Ag Lubricating sealing means for rotary combustion engines
US3180563A (en) * 1963-05-13 1965-04-27 Curtiss Wright Corp Oil seal construction for rotary combustion engine
US3323713A (en) * 1964-12-10 1967-06-06 Nsu Motorenwerke Ag Sealing arrangement for rotary mechanisms
US3323712A (en) * 1965-12-11 1967-06-06 Nsu Motorenwerke Ag Rotary internal combustion engine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3904328A (en) * 1971-11-16 1975-09-09 Audi Ag Rotor for rotary combustion engine
US3891357A (en) * 1974-05-03 1975-06-24 Curtiss Wright Corp Rotary mechanism of the type having a planetating rotor
US4516921A (en) * 1975-01-27 1985-05-14 Vida M. Kemp End seals for a rotary machine
US3969049A (en) * 1975-07-17 1976-07-13 Curtiss-Wright Corporation Rotary engine rotor and oil seal configuration
WO1981001169A1 (en) * 1979-10-29 1981-04-30 R Hoffmann Rotary expansion power unit
US4297090A (en) * 1979-10-29 1981-10-27 Trochoid Power Corporation Rotary expansion power unit with valve disc connected to crankshaft
US5232355A (en) * 1991-05-17 1993-08-03 Mitsubishi Denki K.K. Scroll-type fluid apparatus having a labyrinth and oil seals surrounding a scroll shaft

Similar Documents

Publication Publication Date Title
US3824047A (en) Floating rotary ring member of fluid displacement device
US3369740A (en) Rotary piston internal combustion engine, especially circular piston internal combustion engine
US5215165A (en) Oil pump
US3452723A (en) Rotary piston internal combustion engine,especially circular piston internal combustion engine
US3224421A (en) Rotary engines with rotating distributors
GB961872A (en) Fluid-handling rotary machine
US3106912A (en) Air cooled rotary internal combustion engine
US3215129A (en) Rotary internal combustion motor
US3727589A (en) Rotary internal combustion engine
US2979042A (en) Seal vent arrangement for rotating combustion engines
US3760777A (en) Rotary-piston engine
US3323713A (en) Sealing arrangement for rotary mechanisms
US3852002A (en) Gyrating-cam engine, particularly as a hydraulic engine
US3249094A (en) Lubricating sealing means for rotary combustion engines
GB1125717A (en) Improvements in rotary alternating piston engines
US3269370A (en) Rotor cooling means for rotary mechanism
US3352290A (en) Multi-stage rotary piston engine
GB994957A (en) Improvements relating to rotary-piston internal combustion engines
US3990410A (en) Rotary engine with rotary valve
US3216405A (en) Rotary piston internal combustion engine
US3413961A (en) Rotary piston engine, especially circular piston internal combustion engine
US2222183A (en) Combustion gas turbine
US3364868A (en) Rotary piston engine
US3369738A (en) Rotor guide arrangement for a rotary internal combustion engine
US4102615A (en) Internally cooled rotary combustion engine