US2776627A - Power transmission - Google Patents

Power transmission Download PDF

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Publication number
US2776627A
US2776627A US298079A US29807952A US2776627A US 2776627 A US2776627 A US 2776627A US 298079 A US298079 A US 298079A US 29807952 A US29807952 A US 29807952A US 2776627 A US2776627 A US 2776627A
Authority
US
United States
Prior art keywords
shaft
cylinder barrel
pistons
barrel
valve plate
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
US298079A
Other languages
English (en)
Inventor
Keel Adolf
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.)
Vickers Inc
Original Assignee
Vickers Inc
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 Vickers Inc filed Critical Vickers Inc
Priority to US298079A priority Critical patent/US2776627A/en
Priority to US298078A priority patent/US2776628A/en
Priority to GB19028/53A priority patent/GB767804A/en
Priority to FR1082990D priority patent/FR1082990A/fr
Priority to DEV7080A priority patent/DE1040337B/de
Priority to GB10158/54A priority patent/GB778186A/en
Priority to FR1101901D priority patent/FR1101901A/fr
Priority to CH325953D priority patent/CH325953A/fr
Application granted granted Critical
Publication of US2776627A publication Critical patent/US2776627A/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
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0032—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F01B3/0044—Component parts, details, e.g. valves, sealings, lubrication
    • F01B3/0052—Cylinder barrel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0032—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F01B3/0041—Arrangements for pressing the cylinder barrel against the valve plate, e.g. fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0082—Details
    • F01B3/0085—Pistons
    • F01B3/0088—Piston shoe retaining means
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18296—Cam and slide
    • Y10T74/18336—Wabbler type

Definitions

  • This invention relates to power transmissions, and is particularly applicable to those of the type comprising two or more fluid pressure energy translating devices, one of which may function as a pump and another as a fluid motor.
  • the invention is more particularly concerned with a fluid pump or motor construction of the type having a rotary cylinder barrel abutting a stationary valve plate and provided with axial cylinders and pistons reciprocal therein which abut against a thrust plate, the axis of which is inclined to the axis of rotation of the cylinder barrel. It is particularly concerned with that class of devices wherein the pistons abut directly against the inclined thrust plate without the use of articulated connectv ing rods so that the driving torque is transmitted to the pistons acting as cantilevers by reason of that component of piston thrust against the inclined thrust plate which is normal to the shaft axis.
  • the normal thrust component or side thrust on the piston not only creates the driving torque but also results in a substantial lateralforce on the cylinder barrel tending to displace it from its normal position.
  • this lateral force it is important that the cylinder barrel be maintained flatly against the valve plate or it will frequently lift off completely due to fluid flow conditions let up when it starts to lift ofi slightly. This of course renders the Whole device inoperative and may be very hazardous where the device The axial a corporation of ice . an improved cantilever piston type pump or motor of rugged, low cost construction.
  • a further object is to provide such means which are particularly well suited for use with a cantilever piston pump in which the cylinder barrel is drive shaft supported.
  • Figure 1 is a longitudinal transverse section of a fluid pressure energy translating device incorporating a preferred form of the present invention.
  • Figure 2 is a partial section taken on line 22 of Figure l.
  • the embodiment of the invention selected for illustration comprises pump 10 of the cantilever piston type.
  • the housing 12 of pump 10 comprises two parts 14 and 16 secured together by bolts 18.
  • An 0 ring seal 20 insures a fluid tight juncture of the two parts and the dowel pin 22 maintains proper angular alignment between them.
  • Body 12 includes a pilot portion 24 and a mounting flange 26 having mounting holes 28 therein.
  • a bore 30 in housing 12 provides a chamber 32 having a cylinder barrel 34 positioned therein.
  • Cylinder barrel 34 is provided with a plurality of bores 36, each having a piston 33 axially slidable therein and a cylinder port 37.
  • Pistons 38 have spherical ends 40 on which are swaged the socketed shoes 42.
  • the cylinder barrel 34 is positioned axially between a valve plate 44 and an inclined thrust plate 46.
  • Valve plate 44 may be the type described in the patent to Harry F. Vickers et al., 2,313,407, and serves in a well known manner to provide properly phased fluid connection between ports 37 of bores 36 and the external inlet and outlet connection ports of the device, one of which is indicated at 48.
  • Thrust plate 46 is secured to the housing 12 by a number of screws 50 sealed against leakage from chamber 32 by 0 rings 52.
  • the first of these pro which is provided with a female spline to engage a male spline on the cylinder barrel at 70.
  • a plurality of springs 72in recesses 74 in cylinder barrel 34 act through collar 68, sleeve 60, and cage 56 to bias the shoes 42 into engagement with the face 47 of thrust plate 46.
  • the reaction force of springs 72 biases face 35 of the cylinder barrel 34 into engagement with face 45 of valve plate 44.
  • a drive shaft 76 is effective to transmit torque from a prime mover, not shown, to the cylinder barrel through a driving connection at 78. Further, it can be seen that the only radial support for cylinder barrel 34 is provided by the contact between the barrel and the shaft 76 at connection 78.
  • Connection 78 is illustrated as a spline connection and preferably is of the universal type,
  • connection 78 locates the barrel radially.
  • spline connection 70 between the collar 68 and cylinder barrel 34 is concentric with the spline connection 78'between barrel 34 and shaft 76.
  • Spline connection-J" provides, in a short axial distance,- strong support for; collar 68 against cocking relative to cylinder barrel34';
  • connection 781 s axially, centered 'ab'outthe intersection 82thus minimizing, tipping forces. on the. barrel'34:
  • the axis 65 of the conical bore 64 intersects the axis, of 'shaft76 at the point 82"and point 82 is also thecenter of the spherical surface 66' of'collar 68 as indicated by the radius 67:
  • Springs 72 are effective to bias the cylinder barrel 34 against valve plate,
  • a cylindrical extension 84 is provided, on theportion 14 of housing 12,1which protrudes from the face 86,
  • Extension 84 has a bearing bore 83 at its outward end and carries a shaft support bearing 90therein.
  • a second shaft support bearing 92. and a shaft seal 94 are provided inthe shaft bore 96.
  • Valve plate 44 and cylinder barrel 34 are.
  • Bearing 90 is thus; positionedin axial -proximity to the connection 78 and. thebending moment created by the radialload of barrel.
  • the present invention provides a rugged, low cost, and compact cantilever piston" pump or motor having improvedl means for biasingthe cylinder barrel'against the valve plate. and the pistons-- outwardly toward the-thrust plate.
  • the inven-v tion providessuch means especially Well suited. for use. in a unit having a shaft supported cylinder barrel since.
  • the barrel support and the, piston biasing, mechanism may both be positioned at their optimum location .without interference.
  • the center: of 'said spherical'outer surface being positioned at the intersection of the axis of the conical boreand-theaxis of thedriveeshaft, the intersection of said axes being coincident with the point on the shaft axis at whichathe shaft axis-pierces the plane containing the centers of said spherical surfaces at the ends of the pistons; a mechanical force transmitting connection between said sleeve and said pistons; and resilienti biasing means exerted betweenthe. cylinder barrel.- and' said collar whereby. the. cylinder: barrel is biased' against the valve plate and the,pistons are biasedtoward, the thrust plate.
  • a fluid pressure-energy, translating device comprising: a drive shaft;.a housing. having a stationary valveplate; a rotatable cylinder barrel in abutment with; the. valve plate and in driving relation with the drive shaft, and having a plurality of axial cylinder bores; pistons. reciprocable in the bores and having a spherical surface. at one end of each piston; an inclined thrust plate mounted. in the housing in driving relation with. the pistons; inletand'outlet ports alternately connectable through the valve plate to said cylinder. bores by.
  • a fluidpressure energy translating device comprising-.- ing:. adrive shaft; a housing having a stationary valveplate;,a rotatable cylinder barrel in abutment with the valve plate and in driving relation with the drive'shaft and. having a plurality of axial cylinder bores; pistonsreciprocable in the bores and having-aspherical surface;
  • a fluid pressure energy translating device comprising: a drive shaft; a housing having a stationary valve plate; a rotatable cylinder barrel in abutment with the valve plate and in driving relation with the drive shaft, and having a plurality of axial cylinder bores; pistons reciprocable in the bores; an inclined thrust plate mounted in the housing in driving relation with the pistons; inlet and outlet ports alternately connectable through the valve plate to said cylinder bores by rotation of the cylinder barrel; means on the shaft for locating the barrel as to lateral position; an axially slidable collar encircling the drive shaft and having a spherical outer surface, said collar being so positioned that the center of said spherical surface lies on the drive shaft axis and approximately coincident with the axial center of said means on the shaft; a sleeve member having a central recess contacting the spherical outer surface of the collar; a mechanical force transmitting connection between said sleeve and said pistons; and resilient biasing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Reciprocating Pumps (AREA)
US298079A 1952-07-10 1952-07-10 Power transmission Expired - Lifetime US2776627A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US298079A US2776627A (en) 1952-07-10 1952-07-10 Power transmission
US298078A US2776628A (en) 1952-07-10 1952-07-10 Power transmission
FR1082990D FR1082990A (fr) 1952-07-10 1953-07-09 Transmission de puissance
GB19028/53A GB767804A (en) 1952-07-10 1953-07-09 Improvements in or relating to swash-plate pumps and motors
DEV7080A DE1040337B (de) 1952-07-10 1954-04-01 Hydrostatische Kraftuebertragungseinrichtung
GB10158/54A GB778186A (en) 1952-07-10 1954-04-07 Improvements in swash-plate pumps and motors
FR1101901D FR1101901A (fr) 1952-07-10 1954-05-19 Appareil de transmission d'énergie à fluide sous pression
CH325953D CH325953A (fr) 1952-07-10 1954-05-21 Appareil de transmission d'énergie à fluide sous pression

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US298079A US2776627A (en) 1952-07-10 1952-07-10 Power transmission
US298078A US2776628A (en) 1952-07-10 1952-07-10 Power transmission

Publications (1)

Publication Number Publication Date
US2776627A true US2776627A (en) 1957-01-08

Family

ID=26970462

Family Applications (2)

Application Number Title Priority Date Filing Date
US298079A Expired - Lifetime US2776627A (en) 1952-07-10 1952-07-10 Power transmission
US298078A Expired - Lifetime US2776628A (en) 1952-07-10 1952-07-10 Power transmission

Family Applications After (1)

Application Number Title Priority Date Filing Date
US298078A Expired - Lifetime US2776628A (en) 1952-07-10 1952-07-10 Power transmission

Country Status (5)

Country Link
US (2) US2776627A (fr)
CH (1) CH325953A (fr)
DE (1) DE1040337B (fr)
FR (2) FR1082990A (fr)
GB (2) GB767804A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3049940A (en) * 1961-02-08 1962-08-21 American Brake Shoe Co Balanced piston shoe
US3246577A (en) * 1963-12-23 1966-04-19 Sundstrand Corp Piston return mechanism
US3274897A (en) * 1963-12-23 1966-09-27 Sundstrand Corp Piston return mechanism
US3382814A (en) * 1966-05-23 1968-05-14 Sundstrand Corp Piston holddown means
US4771677A (en) * 1985-02-01 1988-09-20 Hydromatik Gmbh Axial piston machine
US5106271A (en) * 1988-10-25 1992-04-21 Sanden Corporation Slant plate type compressor

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303794A (en) * 1967-02-14 Piston return mechanism
US2972955A (en) * 1957-03-21 1961-02-28 Richter Harald Submersible pump
US2953099A (en) * 1957-06-13 1960-09-20 New York Air Brake Co Pump
US3089426A (en) * 1958-09-17 1963-05-14 New York Air Brake Co Engine
DE1201177B (de) * 1959-01-14 1965-09-16 Sperry Rand Corp Hydraulische Axialkolbenmaschine mit dreh-einstellbarer Steuerscheibe
US3139038A (en) * 1961-07-17 1964-06-30 Applied Power Ind Inc Engine
DE1226418B (de) * 1962-07-12 1966-10-06 Unipat A G Einrichtung zum Andruecken der winkelbeweglichen Kolbengleitschuhe an die Schiefscheibe oder Taumelscheibe einer Axialkolbenmaschine (Pumpe oder Motor)
DE1241710B (de) * 1962-07-20 1967-06-01 Dowty Hydraulik Units Ltd Hydraulische Druckausgleichseinrichtung an den Kolbengleitschuhen von hydraulischen Axialkolbenmaschinen
US3255638A (en) * 1963-01-22 1966-06-14 Sprague Engineering Corp Fluid motor
US3241495A (en) * 1963-08-12 1966-03-22 American Brake Shoe Co Construction for axial piston pump or motor
US3289604A (en) * 1964-09-23 1966-12-06 Gunnar A Wahlmark Fluid device
DE1269494B (de) * 1964-10-24 1968-05-30 Bosch Gmbh Robert Einrichtung zum Andruecken der Kolbengleitschuhe an die Schiefscheibe einer Druckfluessigkeits-Axialkolbenmaschine
US3304715A (en) * 1965-05-21 1967-02-21 Int Harvester Co Torque transmitting mechanism in an axial piston type hydraulic power transmission unit
GB1109459A (en) * 1965-06-24 1968-04-10 Sundstrand Corp Hydraulic pump or motor device
US3643549A (en) * 1969-08-01 1972-02-22 Mitsubishi Heavy Ind Ltd Axial piston pump or motor
GB1523693A (en) * 1975-05-27 1978-09-06 Eaton Corp Axial piston hydraulic pumps and motors
US4111103A (en) * 1977-02-14 1978-09-05 Commercial Shearing, Inc. Thrust rings for swash plate pumps and motors
US4611529A (en) * 1984-07-12 1986-09-16 Vickers, Incorporated Axial piston machine constructed in a removable cartridge form to facilitate assembly and disassembly
DD253059A1 (de) * 1986-09-29 1988-01-06 Karl Marx Stadt Ind Werke Hydrostatische axialkolbenmaschine
US5022310A (en) * 1989-03-07 1991-06-11 Stewart Robert M Fluid power transmission
DE4424609B4 (de) * 1994-07-13 2006-01-19 Danfoss A/S Hydraulische Axialkolbenmaschine
US5784949A (en) * 1997-06-25 1998-07-28 Sauer Inc. Retaining system for slipper holddown pins
US5941159A (en) * 1998-01-09 1999-08-24 Sauer Inc. Integral holdown pin mechanism for hydraulic power units
DE10028336C1 (de) * 2000-06-08 2002-04-04 Brueninghaus Hydromatik Gmbh Axialkolbenmaschine
CN105736353A (zh) * 2014-12-10 2016-07-06 西安航空动力控制科技有限公司 一种柱塞泵中心预紧结构中使用的长销钉
DE102023204123A1 (de) * 2023-05-04 2024-11-07 Robert Bosch Gesellschaft mit beschränkter Haftung Axialkolbenmaschine mit variablen Druckfeldern an den Gleitschuhen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1539616A (en) * 1920-07-27 1925-05-26 Waterbury Tool Co Variable-speed gear
US2543624A (en) * 1946-07-24 1951-02-27 Acme Ind Hydraulics Inc Pump
US2620738A (en) * 1950-04-17 1952-12-09 New York Air Brake Co Parallel plunger pump with positive plunger actuation
US2633104A (en) * 1949-07-15 1953-03-31 Borg Warner Motor port construction
US2642810A (en) * 1947-05-10 1953-06-23 Vickers Inc Power transmission

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR587385A (fr) * 1924-10-06 1925-04-17 Appareil de transmission hydraulique
DE882932C (de) * 1938-01-05 1953-07-13 Boehringer Gmbh Geb Raeumlich arbeitendes Hubkolbengetriebe
CH257509A (de) * 1944-10-30 1948-10-15 Von Roll Ag Axialkolbengetriebe mit gewölbtem, die Steuerschlitze aufweisendem Auflagekörper für die rotierende Zylindertrommel.
FR1020522A (fr) * 1949-07-15 1953-02-06 Borg Warner Perfectionnements relatifs aux variateurs de vitesse hydrauliques

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1539616A (en) * 1920-07-27 1925-05-26 Waterbury Tool Co Variable-speed gear
US2543624A (en) * 1946-07-24 1951-02-27 Acme Ind Hydraulics Inc Pump
US2642810A (en) * 1947-05-10 1953-06-23 Vickers Inc Power transmission
US2633104A (en) * 1949-07-15 1953-03-31 Borg Warner Motor port construction
US2620738A (en) * 1950-04-17 1952-12-09 New York Air Brake Co Parallel plunger pump with positive plunger actuation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3049940A (en) * 1961-02-08 1962-08-21 American Brake Shoe Co Balanced piston shoe
US3246577A (en) * 1963-12-23 1966-04-19 Sundstrand Corp Piston return mechanism
US3274897A (en) * 1963-12-23 1966-09-27 Sundstrand Corp Piston return mechanism
US3382814A (en) * 1966-05-23 1968-05-14 Sundstrand Corp Piston holddown means
US4771677A (en) * 1985-02-01 1988-09-20 Hydromatik Gmbh Axial piston machine
US5106271A (en) * 1988-10-25 1992-04-21 Sanden Corporation Slant plate type compressor

Also Published As

Publication number Publication date
US2776628A (en) 1957-01-08
FR1082990A (fr) 1955-01-04
FR1101901A (fr) 1955-10-12
CH325953A (fr) 1957-11-30
DE1040337B (de) 1958-10-02
GB767804A (en) 1957-02-06
GB778186A (en) 1957-07-03

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