US3881847A - Rotary expansion engine of the type having planetating rotor - Google Patents
Rotary expansion engine of the type having planetating rotor Download PDFInfo
- Publication number
- US3881847A US3881847A US420445A US42044573A US3881847A US 3881847 A US3881847 A US 3881847A US 420445 A US420445 A US 420445A US 42044573 A US42044573 A US 42044573A US 3881847 A US3881847 A US 3881847A
- Authority
- US
- United States
- Prior art keywords
- rotor
- pressurized fluid
- side wall
- housing
- wall surfaces
- 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
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
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/18—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
-
- 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
- F01C1/00—Rotary-piston machines or engines
- F01C1/22—Rotary-piston machines or engines of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member
-
- 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
- F02B53/00—Internal-combustion aspects of rotary-piston or oscillating-piston engines
Definitions
- this invention contemplates a rotary expansion engine of the type having a planetary rotor which itself functions to control the introduction of pressurized driving fluid into the working chambers of the engine at predetermined times and duration and thereby eliminates the need for external valves and timing mechanisms.
- the rotary expansion engine of this invention comprises a housing in which, at least, one rotor is eccentrically supported for rotation, the housing and rotor defining a plurality of working chambers which, as the rotor rotates relative to the housing, expand and contract in volumetric size.
- the housing has opposite end walls spaced by a peripheral wall while the rotor consists of opposite side wall surfaces interconnected by a plurality of peripheral flank surfaces, one of each of the side wall surfaces lying adjacent an end wall of the housing.
- a seal means is disposed in the interstices between each of the housing end walls and the side wall surfaces of the rotor to prevent passage of fluid through such interstices.
- a first passageway means is provided in the rotor to communicate with a source of pressurized fluid to receive such fluid from the latter.
- a port means is also provided in said rotor which communicates with the first passageway means and at least one of the interstices between an end wall and the adjcant side wall surface of the rotor at a point radially inward of the seal means.
- a second passageway means is formed in the end wall surface adjacent the side wall surface having said port means, which second passageway means is constructed and arranged to by-pass pressurized fluid around said seal means and to intermittently communicate the port means with a fluid tight working chamber as the rotor rotates thereby delivering pressurized fluid to such working chamber at a time when the pressurized fluid is capable of exerting a torque force on the rotor and effecting rotation of the rotor as the pressurized fluid expands.
- An exhaust means is provided which communicates with the working chambers for passing spent pressurized fluid from the working chambers following expansion of the pressurized fluid.
- the port means includes an annular groove while in another embodiment of the invention the port means includes a plurality of circumferentially spaced openings.
- FIG. I is a transverse cross-sectional view through an expansion engine according to one embodiment of this invention.
- FIG. 2 is a view in cross-section taken substantially along line 22 of FIG. 1;
- FIG. 3 is a schematic view showing how rotation of the rotor controls delivery of pressurized fluid to the working chambers.
- FIG. 4 is a view similar to FIG. 1 showing another embodiment of this invention.
- the reference number 10 generally designates an expansion engine according to this invention.
- the expansion engine will be shown and described as a Wankel type having a three-sided rotor eccentrically rotating in a twolobed epitrochoidal shaped housing cavity such as disclosed in the US. Pat. to George, No. 3,628,899 and Pierce No. 3,535,059. While expansion engine 10 will be described as of the Wankel type having a generally triangular shaped rotor it is to be understood that the invention is not limited thereto.
- the rotor may have two or more than three sides or flank portions in a housing cavity having one or more than two lobes without departure from the scope and spirit of this invention.
- the expansion engine may be of the type shown in the British Patents to Maillard No. 583,035 or Linder No. 989,588.
- the expansion engine 10 as illustrated in FIGS. 1 to 3 comprises a housing 11 having two end walls 12 and 14 attached to an intermediate wall 16 to define a cavity within which a rotor 18 is supported for rotation on an eccentric portion 20 of a crankshaft 22.
- the intermediate wall 16 has an inner peripheral surface 24 of epitrochoidal configuration to form a housing cavity profile of two lobes.
- the rotor 18 comprises a generally triangular body having opposite side wall faces or surfaces 26 and 28 and three contiguous peripheral flank portions 30, the flank portions 30 meeting each other at an apex portion 32.
- the rotor 18 is so dimensioned that side wall surfaces 26 and 28 lie in close spaced relationship with the inner surfaces of end walls 12 and 14, respectively, and define with the housing three working chambers A, B, and C.
- the relative angular position of rotor 18 to the housing 11 is maintained by the conventional meshing internal gear 34 carried by the rotor and a fixed pinion gear 36 (see FIG. 2).
- the sealing means may, as shown, comprise an apex seal blade assembly 38 carried in each of the apex portions 32 of the rotor to engage the inner trochoidal surface 24 of housing 11.
- the sealing means includes a plurality of arcuate shaped side seal strips 40 which are carried in each of the side wall surfaces 26 and 28 to engage the adjacent end walls 12 and 14 of housing 11.
- the sealing means may include an annular seal ring 42 carried in each of the side wall surfaces 26 and 28 to engage the adjacent end walls 12 and 14, this seal ring 42 being spaced radially inwardly from the side seal strips 40.
- the expansion engine is rotated by the introduction of pressurized fluid, gas or liquid, into the working chambers A, B, and C at the proper time by passageway means in accordance with this invention.
- This passageway means includes chamber or cavity 46 in rotor 18.
- a rotor such as disclosed in the US. Pat. to Hermes et al No. 3,655,302, constructed with radial ribs 48 and an annular central web 50 for interconnecting a hub portion 45 and flank portion 30, the cavity 46 is the space formed between ribs 48 and web 50.
- web 50 is provided with a plurality of openings 52 therein.
- a supply passageway is provided.
- This supply passageway may be in the form of a longitudinal bore 54 in the crankshaft 22, radially extending branch passages 56 and the space 47 between rotor hub 45 and end wall 12.
- rotor 18 is provided in side wall surfaces 26 and 28 with an annular groove 58 (see FIG. 1) which is brought into communication with cavity 46 by a plurality of circumferentially spaced holes 60.
- the groove 58 is dimensioned so as to be disposed between seal ring 42 and side seal strips 40.
- pressurized fluid is conducted from a source thereof (not shown) into the interstices between end walls 12 and 14 and side wall surfaces 26 and 28, respectively, via supply passageway 54, branch passages 56, space 47, rotor cavity 46, holes 60 and grooves 58.
- the side seal strips 40 and apex seal pins 44 prevent the pressurized fluid conducted into the interstices from flowing into working chambers A, B and C except periodically as hereinafter explained.
- each groove 58 is intermittently brought into communication with each of two pairs of radially extending grooves 62.
- Each pair of grooves 62 is located in housing walls 12 and 14 and are coextensive with the minor axis of housing 11.
- Each of the grooves of each pair of grooves is dimensioned in length to extend from a point where grooves 58 are brought closest to inner housing surface 24 by the eccentric rotation of rotor 18 within housing 11 and to a point adjacent inner housing surface 24 (see FIG. 2).
- This position of grooves 58 is shown in full lines in FIG. 3 and is a location where rotor 18 is substantially at top center. As can best be seen in FIG.
- grooves 62 serve to bypass pressurized fluid around side seal strips 40 so that pressurized fluid is passed into working chamber A. As shown by the dot-dash lines, this flow of pressurized fluid is cut off to working chamber A when rotor 18 rotates so as to carry groove 58 out of communication with groove 62. The flow of pressurized fluid is not again allowed to flow to working chamber A until the rotor moves a short distance from the position before top center shown by the dotted lines.
- rotor 18 relative to the size and location of the port means (holes and grooves 58) serves as a valve to control flow of pressurized fluid at the proper time and for proper duration to working chambers A, B and C to thereby effect rotation of rotor 18 in a predetermined manner.
- the rotor is subjected to two power impulses for each revolution of rotor 18.
- exhaust ports 64 are provided in end wall 12 of housing 11. As is conventional and well known in the art, exhaust ports 64 are so sized and positioned that the sweep of side seal strips 40 opens and closes the exhaust ports at the proper time.
- the expansion engine 10 has a starter system (not shown) which may be a suitable motor means connected to rotate the crankshaft or a pressurized fluid system such as disclosed in British Pat. No. 8949 to Phippen for effecting rotation of rotor 18.
- a starter system (not shown) which may be a suitable motor means connected to rotate the crankshaft or a pressurized fluid system such as disclosed in British Pat. No. 8949 to Phippen for effecting rotation of rotor 18.
- a starter system may be a suitable motor means connected to rotate the crankshaft or a pressurized fluid system such as disclosed in British Pat. No. 8949 to Phippen for effecting rotation of rotor 18.
- the starter system can be shut off.
- pressurized driving fluid is released to bore 54 from where it flows by way of branch passages 54 passed hub portion 45 into the cavity 46 of rotor 18. If at this time the rotor is in a position where grooves 58 are out of communication with grooves 62, such as the two positions shown by the dot-dash and the dotted lines, pressurized fluid is not delivered to working chamber A until the starter system rotates rotor 18 to a position where grooves 58 are in communication with grooves 62. When this communication is effected, pressurized fluid is delivered to working chamber A.
- the drive or momentum of the rotor carries it to a position where the pressurized fluid, as it expands, exerts a torque force on the flank portions 30 of rotor 18 in a clockwise direction.
- the pressurized fluid power impulse
- one of the exhaust ports 64 is brought into communication with working chamber A to pass the spent gas from the working chamber, further rotation of rotor 18 functioning to displace the remaining spent pressurized fluid as the rotor moves into a position for another power impulse by pressurized fluid conducted into the working chamber by the other set of grooves 62.
- the starter system is shut-off.
- FIG. 4 is shown another embodiment of the present invention which only differs from that shown in FIGS. 1 to 3 in that in place of each of the grooves 58 three elongated openings 66 are provided for communicating and passing pressurized fluid to grooves 62.
- Parts of this embodiment shown in FIG. 3 corresponding to like parts of the expansion engine shown in FIGS.
- the present invention provides an expansion engine having a planetary rotor which is of relatively simple construction and inexpensive. It is an expansion engine in which pressurized fluid intake into the working chambers is controlled directly by rotor rotation and thus eliminates the need for external valves and timing mechanisms.
- a rotary expansion engine comprising:
- a housing having opposite end walls spaced apart by a trochoidal peripheral wall and defining therebetween a multi-lobe trochoidal shaped cavity;
- a rotor having opposite side wall surfaces interconnected by a plurality of peripheral flank surfaces
- seal means disposed in the interstices between each of the end walls and adjacent side wall surfaces of the rotor;
- the rotor and housing defining therebetween a plurality of working chambers which successively expand and contract as the rotor eccentrically rotates within the housing cavity;
- a first passageway means in said rotor communicating with a source of pressurized fluid to receive the latter;
- port means in said rotor communicating with said first passageway means and the interstices between the end wall of the housing and the adjacent side wall surface of the rotor;
- second passageway means in at least one of the end wall surfaces located adjacent each of the lobe junctures for bypassing pressurized fluid around said seal means and located and sized so as to intermittently communicate the port means with a fluid tight working chamber as the rotor rotates thereby delivering pressurized fluid to such working chamber for effecting expansion of the pressurized fluid and rotation of the rotor;
- exhaust means communicating with the working chambers for passing spent pressurized fluid from the working chambers following expansion of the pressurized fluid.
- said second passageway means is a groove in each end wall surface and extending to a point of intersection with the path of movement of said port means.
- said second passageway means is a groove in each end wall surface extending substantially radially relative to the axis of planetation of the rotor.
- seal means includes first seal means and radially inwardly spaced second seal means and wherein said port means is located between said first and second seal means.
- said port means includes an annular groove in each of said opposite side wall surfaces of the rotor.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Hydraulic Motors (AREA)
Abstract
Description
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US420445A US3881847A (en) | 1973-11-30 | 1973-11-30 | Rotary expansion engine of the type having planetating rotor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US420445A US3881847A (en) | 1973-11-30 | 1973-11-30 | Rotary expansion engine of the type having planetating rotor |
Publications (1)
Publication Number | Publication Date |
---|---|
US3881847A true US3881847A (en) | 1975-05-06 |
Family
ID=23666500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US420445A Expired - Lifetime US3881847A (en) | 1973-11-30 | 1973-11-30 | Rotary expansion engine of the type having planetating rotor |
Country Status (1)
Country | Link |
---|---|
US (1) | US3881847A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4047856A (en) * | 1976-03-18 | 1977-09-13 | Hoffman Ralph M | Rotary steam engine |
US4150926A (en) * | 1977-01-10 | 1979-04-24 | Borsig Gmbh | Rotary piston compressor with transfer flow pockets in housing |
WO1981001169A1 (en) * | 1979-10-29 | 1981-04-30 | R Hoffmann | Rotary expansion power unit |
US4657492A (en) * | 1982-10-27 | 1987-04-14 | Sumitomo Electric Industries, Ltd. | Rotor for a rotary pump |
US6146120A (en) * | 1998-07-29 | 2000-11-14 | Jenn Feng Industrial Co., Ltd. | Rotary engine having an improved rotor structure |
WO2012069198A1 (en) * | 2010-11-25 | 2012-05-31 | Avl List Gmbh | Rotary piston machine, especially rotary engine |
US8539931B1 (en) | 2009-06-29 | 2013-09-24 | Yousry Kamel Hanna | Rotary internal combustion diesel engine |
US8905736B2 (en) | 2012-03-22 | 2014-12-09 | Pratt & Whitney Canada Corp. | Port for rotary internal combustion engine |
US10871161B2 (en) | 2017-04-07 | 2020-12-22 | Stackpole International Engineered Products, Ltd. | Epitrochoidal vacuum pump |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2988065A (en) * | 1958-03-11 | 1961-06-13 | Nsu Motorenwerke Ag | Rotary internal combustion engine |
US3180323A (en) * | 1960-06-01 | 1965-04-27 | Nsu Motorenwerke Ag | Air cooling systems for rotary mechanisms |
US3340853A (en) * | 1965-04-01 | 1967-09-12 | Edwin A Link | Rotary piston engine |
US3373722A (en) * | 1965-09-17 | 1968-03-19 | Nsu Motorenwerke Ag | Cooling system for the rotor of a rotary internal combustion engine |
US3825375A (en) * | 1972-01-05 | 1974-07-23 | N Deane | Rotary driving |
-
1973
- 1973-11-30 US US420445A patent/US3881847A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2988065A (en) * | 1958-03-11 | 1961-06-13 | Nsu Motorenwerke Ag | Rotary internal combustion engine |
US3180323A (en) * | 1960-06-01 | 1965-04-27 | Nsu Motorenwerke Ag | Air cooling systems for rotary mechanisms |
US3340853A (en) * | 1965-04-01 | 1967-09-12 | Edwin A Link | Rotary piston engine |
US3373722A (en) * | 1965-09-17 | 1968-03-19 | Nsu Motorenwerke Ag | Cooling system for the rotor of a rotary internal combustion engine |
US3825375A (en) * | 1972-01-05 | 1974-07-23 | N Deane | Rotary driving |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4047856A (en) * | 1976-03-18 | 1977-09-13 | Hoffman Ralph M | Rotary steam engine |
US4150926A (en) * | 1977-01-10 | 1979-04-24 | Borsig Gmbh | Rotary piston compressor with transfer flow pockets in housing |
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 |
US4657492A (en) * | 1982-10-27 | 1987-04-14 | Sumitomo Electric Industries, Ltd. | Rotor for a rotary pump |
US6146120A (en) * | 1998-07-29 | 2000-11-14 | Jenn Feng Industrial Co., Ltd. | Rotary engine having an improved rotor structure |
US8539931B1 (en) | 2009-06-29 | 2013-09-24 | Yousry Kamel Hanna | Rotary internal combustion diesel engine |
WO2012069198A1 (en) * | 2010-11-25 | 2012-05-31 | Avl List Gmbh | Rotary piston machine, especially rotary engine |
US9534594B2 (en) | 2010-11-25 | 2017-01-03 | Avl List Gmbh | Rotary piston machine, especially rotary engine |
US8905736B2 (en) | 2012-03-22 | 2014-12-09 | Pratt & Whitney Canada Corp. | Port for rotary internal combustion engine |
US10871161B2 (en) | 2017-04-07 | 2020-12-22 | Stackpole International Engineered Products, Ltd. | Epitrochoidal vacuum pump |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4047856A (en) | Rotary steam engine | |
US7350501B2 (en) | Planetary rotary internal combustion engine | |
US4086880A (en) | Rotary prime mover and compressor and methods of operation thereof | |
US3951112A (en) | Rotary internal combustion engine with rotating circular piston | |
US3769944A (en) | Rotary engine | |
US3881847A (en) | Rotary expansion engine of the type having planetating rotor | |
US4132213A (en) | Rotary engine | |
US3858557A (en) | Two-stage rotary engine of trochoidal type | |
US3791352A (en) | Rotary expansible chamber device | |
US4316439A (en) | Rotary engine with internal or external pressure cycle | |
US4111617A (en) | Rotary piston mechanism | |
US3314401A (en) | Two-stroke cycle rotary engine | |
US3739754A (en) | Rotating-piston toroidal machine with rotating-disc abutment | |
US3797237A (en) | Internal combustion engine having two pistons rotatable through separate intersecting circular paths | |
US3952709A (en) | Orbital vane rotary machine | |
US3825375A (en) | Rotary driving | |
US3200796A (en) | Rotary piston internal combustion engine | |
US3307525A (en) | Rotary piston expansible chamber machine | |
US3311094A (en) | Rotary engine | |
US3990410A (en) | Rotary engine with rotary valve | |
US3165093A (en) | Rotary internal combustion engine | |
US4022553A (en) | Rotary piston compressor with inlet and discharge through the pistons which rotate in the same direction | |
US4215533A (en) | Rotary expander engine | |
US3108579A (en) | Rotary piston internal combustion engine | |
US3358652A (en) | Rotary engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: JOHN DEERE TECHNOLOGIES INTERNATIONAL, INC., JOHN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CURTISS-WRIGHT CORPORATION, A CORP. OF DE;REEL/FRAME:005646/0925 Effective date: 19840223 |
|
AS | Assignment |
Owner name: SNYDER, LARRY L. Free format text: SECURITY INTEREST;ASSIGNOR:ROTARY POWER INTERNATIONAL, INC., A CORPORATION OF DE;REEL/FRAME:006027/0113 Effective date: 19920220 Owner name: LOEB PARTNERS CORPORATION Free format text: SECURITY INTEREST;ASSIGNOR:ROTARY POWER INTERNATIONAL, INC., A CORPORATION OF DE;REEL/FRAME:006027/0122 Effective date: 19920220 Owner name: SNYDER, SHERYL K. Free format text: SECURITY INTEREST;ASSIGNOR:ROTARY POWER INTERNATIONAL, INC., A CORPORATION OF DE;REEL/FRAME:006027/0113 Effective date: 19920220 |
|
AS | Assignment |
Owner name: ROTARY POWER INTERNATIONAL, INC., NEW JERSEY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:JOHN DEERE TECHNOLOGIES INTERNATIONAL, INC.;REEL/FRAME:006031/0870 Effective date: 19911231 |