US3680987A - Rotary piston engine - Google Patents

Rotary piston engine Download PDF

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Publication number
US3680987A
US3680987A US45953A US3680987DA US3680987A US 3680987 A US3680987 A US 3680987A US 45953 A US45953 A US 45953A US 3680987D A US3680987D A US 3680987DA US 3680987 A US3680987 A US 3680987A
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US
United States
Prior art keywords
valve
ring
splined
casing
shaft
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
US45953A
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English (en)
Inventor
Carl V Ohrberg
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.)
Danfoss AS
Original Assignee
Danfoss AS
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 DE19691931144 external-priority patent/DE1931144B/de
Application filed by Danfoss AS filed Critical Danfoss AS
Application granted granted Critical
Publication of US3680987A publication Critical patent/US3680987A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/103—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member one member having simultaneously a rotational movement about its own axis and an orbital movement
    • F04C2/104—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member one member having simultaneously a rotational movement about its own axis and an orbital movement having an articulated driving shaft
    • 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
    • F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/10—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner 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
    • 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
    • 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

  • ABSTRACT The invention relates to a rotary piston engine of the type having an internally toothed ring and an externally toothed wheel which is orbitably and rotatably movable relative to the ring.
  • the motor has a disk shaped valve which is driven by the externally toothed wheel through a universal joint shaft.
  • the valve In order that the shaft only applies torque to the valve, to the exclusion of any axially directed force, the valve has a splined bore and is journalled on a cylindrically shaped abutment which is fixed relative to the casing.
  • the invention relates to a rotary piston engine, in which displacement chambers are formed between an externally toothed wheel and an internally toothed ring, and the toothed wheel is connected, through a universal joint shaft independent of the main shaft, to a rotary slide valve, which, together with a valve part connected to the toothed ring, forms a distributing valve, the universal joint shaft being connected, by means of a toothed portion, to the toothed wheel so that it rotates therewith.
  • German Patent Specification I 198750 discloses a rotary piston engine of this kind which can be used as a pump or a motor. In this engine the rotary movement of the toothed wheel is transmitted through a universal joint shaft to the main shaft (or vice versa). The charging and voiding cycle of the displacement chambers,
  • a sleeve-like rotary piston valve which is connected by way of a second universal joint shaft to the toothed wheel. It cooperates with apertures in the casing each of which leads to the root of a tooth. Distributed over the periphery of the rotary slide valve are openings which are alternately connected to the pressure and the low-pressure sides of the engine and the number of which is twice as great as the number of teeth on the toothed wheel.
  • Both universal joint shafts are connected, by means of the toothed portion, to the toothed wheel so as to rotate therewith. In each case, the free ends of the universal joint shafts engage the main shaft and the sleeve-like rotary slide valve respectively, by way of link-pin connections.
  • the object of the invention is to provide a rotary piston engine of the initially described kind that is reliable in-operation and incorporates a disc-shaped rotary slide valve instead of a sleeve-shaped one.
  • this object is achieved by forming the rotary slide valve as a disc, by connecting the universal joint shaft to the rotary slide valve so that it rotates therewith and is enabled to execute axial movement, and by providing a stop, connected to the toothed ring, for that end-face of the universal joint shaft associated with the rotary slide valve.
  • the toothed ring and the stop are secured to the casing.
  • the stop can simply be part of the casing.
  • the universal joint shaft and the rotary slide valve can be interconnected to rotate with each other by means of a toothed arrangement. Then, both ends of the universal joint shaft can be of the same shape. As is well known, the toothed construction permits axial displacement.
  • the stop takes the form of a plug extending into the rotary slide valve.
  • this plug can be mounted on the plug. In contrast to mounting the valve by its periphery, this offers the advantage that only low circumferential speeds occur at the bearing.
  • a cutoff passage in the rotary slide valve should lead from each control opening to the opposite face of the slide valve, and recesses that mirror the orifices in the valve part should be provided in the component bearing against said slide valve face. In this way pressure is relieved at the orifices in the valve part.
  • all even-numbered openings can be interconnected by an outerannular groove, and all oddnumbered openings by an inner annular groove in that end face of the rotary slide valve presented to the valve part, and these openings can be connected to the associated unions through annular grooves which have approximately the same radius as the first-mentioned annular grooves in the opposite component. In this way, those pressure effects stemming from the annular supply grooves are eliminated.
  • the rotary slide valve is then relieved overall not only of the mechanical forces stemming from the universal joint shaft, but also of the hydraulic forces deriving from the pressure medium.
  • FIG. 1 shows a longitudinal section through a rotary piston engine designed in accordance with the inventron
  • FIG. 2 is a cross-section on the line A-A of FIG. 1, and
  • FIG. 3 is a cross-section on the line B-B of FIG. 1.
  • the casing of the rotary piston engine illustrated consists of a bearing portion 1, an intermediate part 2, a side portion 3, an outer ring 4, a second side portion 5, a slide plate 6, a casing ring 7 and a connecting cover-plate 8.
  • the parts 1-5 are interconnected by screw-bolts 9, and the parts 4-8 by screw-bolts 10.
  • a main shaft 11 is mounted in bearings 12 and 13 in the bearing portion 1.
  • This toothed wheel is in an engagement with rollers 16, which are rotatably mounted in bearings 17 and 18 in the side portions 3 and and are arranged in recesses 19 in the outer ring 4, there being a clearance between the roller and the outer ring.
  • rollers 16 which are rotatably mounted in bearings 17 and 18 in the side portions 3 and and are arranged in recesses 19 in the outer ring 4, there being a clearance between the roller and the outer ring.
  • Sliding seals 21 are contained in grooves 22 in the outer ring 4, and are urged against the peripheral surface of each of the rollers 16 by a leaf spring 23 or the pressure obtaining in the chamber 24. In this way a perfect seal is achieved between adjacent displacement chambers 20 despite the clearance between each roller 16 and each recess 19.
  • the chambers 24 below the sliding seals 21 are interconnected by way of an annular groove 25 in the side portion 5.
  • This annular groove communicates, by way of axial passages 26, with an annular groove 27, which in turn communicates, by way of two similar paths, with the unions 28 and 29 in the cover 8. Only one of these parts is shown. It consists of an axial bore 30 in the slide plate 6, a non-return valve 31 in the casing ring 7 and a connecting passage 32 in the cover 8.
  • the non-return valve ensures that even if the engine operates on a reversible system, the side under higher pressure communicates with the chambers 24 each time.
  • An axial passage 33 in the side portion 5 terminates at a displacement chamber 20 between each two rollers 16, and each axial passage 33 is continued as an axial passage 34in the slide part 6. Since in the present case, nine rollers 16 are present, there are also nine such passages 33 and 34.
  • Cooperating with the ends of the passages 34 is a rotary slide valve 35 which is driven at the same speed as the toothed wheel by a universal joint shaft 36, the two ends of which likewise engage by an outer toothed arrangement in a corresponding inner toothed arrangement.
  • the rotary slide 35 is mounted on a plug 37 which is held in the cover 8.
  • the rotary 'slide valve contains eight openings 38, which are connected to the union 28 by way of an annular groove 39,
  • the rotary slide valve contains eight openings 40 which are connected to the union 29 by way of an annular groove 41.
  • the rotary slide valve 35 and the slide plate 6 constitute a commutating valve, which performs the function of connecting the displacement chambers 20 to the pressure or low-pressure side of the engine in the correct sequence.
  • the openings 38 on the side opposite the annular groove 39 are inter- 28l$?fii3 ss ais ae zaa 5% 38932? 28F? connected by an annular groove 43.
  • a surface 44, similar to the mouths is recessed in the cover 8, and a cut-off passage 45 leads from each opening 38,40 to an end-face of the cover 8, so that the same pressure obtains in the recesses 44 as at the mouths of the passages 34.
  • the recesses 44 are shown in broken lines in FIG. 3; this Figure also shows that the cut-off passages 45 each have a widened portion 45a at the end face, which portion is equal to the width of the openings 38 and 40.
  • the cover 8 contains two non-return valves, not illustrated, by means of which leaking oil is passed in each case to the low-pressure unions.
  • a rotary piston motor comprising a casing, an internally toothed ring in fixed relation to said casing, an externally toothed wheel cooperable with said ring and being orbitably and rotatably movable relative to the axis of said ring, a disk shaped valve mounted for rotation relative to the axis of said ring, said wheel and said valve each having a centrally disposed splined bore, a universal joint shaft having splined heads at opposite ends thereof in meshing engagement respectively with said wheel and valve splined bores, an abutment member in abutting engagement with an internal wall of said casing and extending part way into said splined bore of said valve for axial thrust engagement with the adjacent one of said splined heads, said abutment member having a cylindrically shaped surface in engagement with said valve bore for supporting said valve for rotation about the axis of said ring.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Hydraulic Motors (AREA)
  • Transmission Devices (AREA)
  • Rotary Pumps (AREA)
US45953A 1969-06-19 1970-06-15 Rotary piston engine Expired - Lifetime US3680987A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691931144 DE1931144B (de) 1969-06-19 Parallel- und innenachsige Rotationskolbenmaschine mit Kämmeingriff

Publications (1)

Publication Number Publication Date
US3680987A true US3680987A (en) 1972-08-01

Family

ID=5737447

Family Applications (1)

Application Number Title Priority Date Filing Date
US45953A Expired - Lifetime US3680987A (en) 1969-06-19 1970-06-15 Rotary piston engine

Country Status (7)

Country Link
US (1) US3680987A (fr)
CH (1) CH501822A (fr)
CS (1) CS189567B2 (fr)
ES (1) ES380305A1 (fr)
FR (1) FR2052714A5 (fr)
GB (1) GB1308635A (fr)
PL (1) PL80713B1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3799201A (en) * 1973-04-05 1974-03-26 Danfoss As Distributor valve for an internally shafted orbital piston machine
US3862814A (en) * 1973-08-08 1975-01-28 Eaton Corp Lubrication system for a hydraulic device
US3930766A (en) * 1973-05-04 1976-01-06 Eaton Corporation Radial balancing means for a hydraulic device
US4533302A (en) * 1984-02-17 1985-08-06 Eaton Corporation Gerotor motor and improved lubrication flow circuit therefor
EP0222265A1 (fr) * 1985-11-06 1987-05-20 Eaton Corporation Pompe à engrenage interne avec circuit de lubrification
US5228846A (en) * 1991-11-25 1993-07-20 Eaton Corporation Spline reduction extension for auxilliary drive component
US6699024B2 (en) 2001-06-29 2004-03-02 Parker Hannifin Corporation Hydraulic motor
US20130202464A1 (en) * 2012-02-02 2013-08-08 Jtekt Corporation Electric oil pump system
US20140147321A1 (en) * 2010-10-29 2014-05-29 Eaton Corporation Fluid device with pressurized roll pockets
US20160230788A1 (en) * 2015-02-11 2016-08-11 Danfoss A/S Hydraulic machine
CN107642381A (zh) * 2017-09-27 2018-01-30 重庆华稷新能源科技有限公司 一种滚动转子膨胀机或压缩机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035113A (en) * 1976-01-30 1977-07-12 Eaton Corporation Gerotor device with lubricant system
GB2240365B (en) * 1990-01-29 1994-10-12 White Hollis Newcomb Jun Orbiting valve hydraulic motor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270681A (en) * 1964-11-18 1966-09-06 Germane Corp Rotary fluid pressure device
US3272142A (en) * 1965-08-13 1966-09-13 Char Lynn Co Porting and passage arrangement for fluid pressure device
US3286645A (en) * 1965-07-09 1966-11-22 Char Lynn Co Rotary fluid pressure device
US3289542A (en) * 1963-10-29 1966-12-06 Lawrence Machine & Mfg Company Hydraulic motor or pump
US3309999A (en) * 1965-06-21 1967-03-21 Char Lynn Co Drive mechanism for gerotor gear set
US3431863A (en) * 1965-03-05 1969-03-11 Danfoss As Guide means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289542A (en) * 1963-10-29 1966-12-06 Lawrence Machine & Mfg Company Hydraulic motor or pump
US3270681A (en) * 1964-11-18 1966-09-06 Germane Corp Rotary fluid pressure device
US3431863A (en) * 1965-03-05 1969-03-11 Danfoss As Guide means
US3309999A (en) * 1965-06-21 1967-03-21 Char Lynn Co Drive mechanism for gerotor gear set
US3286645A (en) * 1965-07-09 1966-11-22 Char Lynn Co Rotary fluid pressure device
US3272142A (en) * 1965-08-13 1966-09-13 Char Lynn Co Porting and passage arrangement for fluid pressure device

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3799201A (en) * 1973-04-05 1974-03-26 Danfoss As Distributor valve for an internally shafted orbital piston machine
US3930766A (en) * 1973-05-04 1976-01-06 Eaton Corporation Radial balancing means for a hydraulic device
US3862814A (en) * 1973-08-08 1975-01-28 Eaton Corp Lubrication system for a hydraulic device
US4533302A (en) * 1984-02-17 1985-08-06 Eaton Corporation Gerotor motor and improved lubrication flow circuit therefor
EP0222265A1 (fr) * 1985-11-06 1987-05-20 Eaton Corporation Pompe à engrenage interne avec circuit de lubrification
US5228846A (en) * 1991-11-25 1993-07-20 Eaton Corporation Spline reduction extension for auxilliary drive component
US6699024B2 (en) 2001-06-29 2004-03-02 Parker Hannifin Corporation Hydraulic motor
US20140147321A1 (en) * 2010-10-29 2014-05-29 Eaton Corporation Fluid device with pressurized roll pockets
US9341063B2 (en) * 2010-10-29 2016-05-17 Eaton Corporation Fluid device with roll pockets alternatingly pressurized at different pressures
US20130202464A1 (en) * 2012-02-02 2013-08-08 Jtekt Corporation Electric oil pump system
US9175680B2 (en) * 2012-02-02 2015-11-03 Jtekt Corporation Electric oil pump system
US20160230788A1 (en) * 2015-02-11 2016-08-11 Danfoss A/S Hydraulic machine
US10385887B2 (en) * 2015-02-11 2019-08-20 Danfoss A/S Hydraulic machine
CN107642381A (zh) * 2017-09-27 2018-01-30 重庆华稷新能源科技有限公司 一种滚动转子膨胀机或压缩机

Also Published As

Publication number Publication date
DE1931144A1 (de) 1971-01-07
CS189567B2 (en) 1979-04-30
FR2052714A5 (fr) 1971-04-09
ES380305A1 (es) 1973-03-16
CH501822A (de) 1971-01-15
PL80713B1 (fr) 1975-08-30
GB1308635A (en) 1973-02-21

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