US3631764A - Hydraulic pumps or motors of the rotating barrel-type - Google Patents

Hydraulic pumps or motors of the rotating barrel-type Download PDF

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Publication number
US3631764A
US3631764A US780699A US3631764DA US3631764A US 3631764 A US3631764 A US 3631764A US 780699 A US780699 A US 780699A US 3631764D A US3631764D A US 3631764DA US 3631764 A US3631764 A US 3631764A
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United States
Prior art keywords
barrel
plate
support
pistons
axis
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Expired - Lifetime
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US780699A
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English (en)
Inventor
Rene Lucien
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Messier SA
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Messier SA
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Publication date
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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
    • F01B3/007—Swash plate
    • 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
    • F01B3/007—Swash plate
    • F01B3/0073—Swash plate swash plate bearing means or driving or driven axis bearing means
    • 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
    • F01B3/10—Control of working-fluid admission or discharge peculiar thereto
    • F01B3/103—Control of working-fluid admission or discharge peculiar thereto for machines with rotary cylinder block
    • F01B3/106—Control of working-fluid admission or discharge peculiar thereto for machines with rotary cylinder block by changing the inclination of the swash plate

Definitions

  • the cylinders are alternately put into [54] HYDRAULIC PUMPS 0R MOTORS OF THE communication with the first and second orifices.
  • the barrel is ROTATING BARREL TYPE connected to a shaft for rotation therewith.
  • a bearing 18 pro- 1 Claim 5 Drawing Figs vrded inside the barrel between the barrel and a support therefor.
  • the bearing is of a small diameter and disposed at [52] US. Cl 91/506, the point of application on the axis of aid barrel of the 417/ 222 resultant of shearing forces applied to said pistons so as to ab- [51] Int.
  • the bearing is so constructed as to permit F04!) 1/26 the barrel to effect slight angular movements with respect to Fleld of Search aid upport and therefore with respect t0 the axis of rotation 230/178; 91/198, 485, 504-506; 1 218 of said shaft.
  • a plate is provided for reciprocably moving the pistons.
  • the plate com rises two laterally spaced convex [56] References cued cylindrical portions having a common axis and a common UNITED STATES PATENTS diameter and arranged symmetrically with respect to the 2,409,185 10/1946 Blasutta 103/ 162 geometric axis of said shaft by which it is supported against 2,945,449 7/1960 Le Febvre et a1. 103/ 162 X two elements having a recess with a shape complementary to 2,525,498 10/1950 Naylor et a1. 103/162 that having a recess with a shape complementary to that of 2,588,866 3/1952 Moon 103/ 162 said convex portion. These elements are rigidly fixed to said 2,925,046 2/ 1960 Budzich 103/ 162 support and form an integral part thereof such that said plate 3,092,034 6/1963 Bartholomaus 103/162 can thereby pivot with respect to said support.
  • the present invention relates to improvements in hydraulic pumps or motors of the rotating barrel type. It is more particularly concerned with improvements made to the articulation system of the actuating plate of the pistons of the pumps or motors of this kind on the fixed frame of these devices.
  • the barrel is mounted floating.
  • a bearing of small diameter is arranged in the interior of the barrel with the object of taking up the shearing forces due to the pressure substantially level with the point of application of their resultant, at the same time ensuring for the barrel the degree of freedom of movement which is necessary so that it can be constantly applied in a perfect manner against the plate or face in which are formed the suction and delivery orifices of the pump.
  • the bearing which takes up the shearing forces is interposed between the barrel and a supporting member which is anchored to the bottom of the pump and through which passes the driving shaft of the barrel.
  • the actuating plate of the pistons pivots on two bearings carried by the pump body. Tests which have subsequently been carried out by the applicants have shown however that this conventional solution is ill suited to conditions of use which result in large forces. Due to the bearings with which it is provided, the pump body is in fact subjected to high bending moments. In addition, the plate and the body of the pump have a tendency to be deformed, due to the large forces to which they are subjected.
  • the present invention has for its object to remedy these drawbacks by articulating the actuating plate on the fixed frame of the pump, without utilizing bearings fixed on the pump body.
  • the plate is provided on its rear face with two cylindrical convex portions, having the same axis and the same diameter, disposed symmetrically with respect to the central plane of the plate, the said convex portions being supported against two concave portions of complementary form, arranged in the support of the bearing which takes up the shearing forces, for example, by means of needle bearings which roll without sliding on the rolling tracks constituted by the said concave portions, the said plate being thus able to pivot with respect to the said support about the geometric axis common to the cylindrical surfaces of the said convex and concave portions.
  • This form of construction of the pump described in the above-mentioned patent has the advantage that the plate may have a form such that the point of application of the resultant of the pressure forces to which it is subjected is very close to one of the supporting surfaces of the plate against the support, so as to reduce the deformation of the said plate to a minimum.
  • this resultant is taken up by the support, no bearing is fixed on the pump body which is thus not subjected to large bending moments and is not appreciably deformed, so that it can be given a considerably simpler form.
  • FIG. 1 is an axial cross section of the pump
  • FIG. 2 is a half section taken along the line ll-Il of FIG. 1;
  • FIG. 3 is a cross section taken along the line IIlIll of FIG. 1, the moving parts and the plate being assumed to have been removed;
  • FIG. 4 is a rear view of the actuating plate
  • FIG. 5 is a partial cross section, in side elevatiomof the part of the support of the bearing which takes up the shearing forces, which cooperates with the actuatingplate.
  • the pump shown in the drawings is a pump which is selfregulating by variation of the cylinder capacity per revolution as a function of the delivery pressure, of the type described in the above-mentioned application.
  • This pump will therefore not be described in detail, but'it will be recalled that it comprises a barrel 1 driven in rotation by a shaft 2 through the intermediary of a sleeve 3 having internal and external splines.
  • This barrel is supported on a domed portion of a hollow support 4'by means of needles 5 which constitute, in the interior of the barrel, a bearing for taking up the shearing forces level with the point of application of the resultant of these forces.
  • the support 4 is rigidly anchored to a flange 6.
  • In the cylinders 7a of the barrel slide pistons 7b, which are coupled to a plate 8 by shoes 9, these being in turn maintained by a plate 10a which slides over the retaining ring l0b. These shoes are supported against the plate 8 through the intermediary of the plate 10.
  • the distribution is effected by a fixed face 12a applied against the bottom 12 or forming an integral part of this latter.
  • This face is provided with two openings, in communication with suction and delivery orifices. At each rotation of the barrel, these openings are put successively into communication with orifices formed in the bottom of each of the cylinders 7a.
  • the barrel 1 is applied against the face 12a by a spring 13-which is supported against the shaft 2 through the intermediary of a ring 14, and at its other extremity on the radial web of the sleeve 3. The force of this spring is taken-up by a bearing 15.
  • the plate 8 is provided laterally on its rear face with two convex cylindrical portions 8a and 8b having the same axis and the same-diameter, being symmetrically arranged with respect to the central plane of the plate (see FIG. 4.).
  • the plate 8 thus pivots on the support 4 about the axis common to the cylindrical surfaces described above.
  • the plate 8 is applied against the support 4 by the pressure forces.
  • a piston 22 sliding in a cylinder 22a of the pump body is pushed back by a spring 21, or by any other means known per se, in the direction of a ring 24, fixed on the plate 8 by screws 25, and on which the piston 22 acts through the intermediary of a roller 23.
  • Plates 26 fixed on the support 4 by screws 27 playthe part of an abutment for the shoes of needles 19a and 19b, grids 19c guiding the needles 19d of the shoes.
  • These grids have a developed length smaller than that of the concave'portions 20a and 20b, the difference being such as to permit the needles 19d to roll without sliding on the portions 8a and 8b on the one hand and 20a and 20b on the other, as soon as the grids have come into abutment against one of the plates 26.
  • the maximum inclination of the plate 8 is ensured, whenstarting up, by the action of a spring, and as soon as the delivery pressure is established, by the action of the pressure forces.
  • this delivery pressure reaches a value known as the regulation pressure, it displaces a slide valve (not shown) which then controls a piston 28 so as to regulate the inclination of the plate 8 through the intennediary of a roller 29.
  • the needle shoes may be dispensed with, the surfaces in contact of the plate and the support being in this case formed of a light-friction material in such manner as to form journal bearings.
  • the piston 22 may be subjected, when so required, to the delivery pressure of the pump so as to apply on the plate 8 a compensating force which tends to give it an inclination.
  • a hydraulic pump or motor comprising a fixed cylindrical casing provided with a bottom having a slide face with first and second orifices formed therein; a barrel supported in said casing for rotation about an axis, said barrel having cylinders and pistons sliding in said cylinders; means for putting said cylinders alternately into communication with said first and second orifices in said slide face; means for reciprocally moving said pistons in said cylinders and producing forces on said pistons having components acting as shearing forces applied to said barrel; a rotatable shaft; means for connecting said barrel to said shaft for rotation therewith; a support to said casing; and a bearing inside the barrel between said support and said barrel, said bearing being of small diameter and disposed at the point of application on the axis of said barrel of the resultant of the shearing forces applied to said pistons so as to absorb said shearing forces, said bearing being so constructed as to permit said barrel to effect slight angular movements with respect to said support and therefore with respect to the axis of rotation of

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US780699A 1967-12-04 1968-12-03 Hydraulic pumps or motors of the rotating barrel-type Expired - Lifetime US3631764A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR130810 1967-12-04

Publications (1)

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US3631764A true US3631764A (en) 1972-01-04

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US780699A Expired - Lifetime US3631764A (en) 1967-12-04 1968-12-03 Hydraulic pumps or motors of the rotating barrel-type

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US (1) US3631764A (enrdf_load_stackoverflow)
DE (1) DE1812743A1 (enrdf_load_stackoverflow)
FR (1) FR1553922A (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779137A (en) * 1971-09-27 1973-12-18 Gen Motors Corp Hydrostatic tilt box bearing
US3868889A (en) * 1970-08-03 1975-03-04 Oilgear Co Fluid device having means for aligning a cylinder barrel
US3955475A (en) * 1974-10-04 1976-05-11 Daikin Kogyo Co., Ltd. Axial piston power transmission
US3991658A (en) * 1972-06-20 1976-11-16 Bobier Wilfred S Fluid device having sintered metal components
US4444092A (en) * 1981-04-02 1984-04-24 Messier-Hispano-Bugatli (SA) Hydraulic pump
US4515067A (en) * 1981-09-09 1985-05-07 Linde Aktiengesellschaft Adjustable axial piston machines
WO1986003547A1 (en) * 1984-12-11 1986-06-19 Sundstrand Corporation Unitary bearing retainer for a swashplate bearing
USRE32373E (en) * 1970-08-03 1987-03-17 Dana Corporation Fluid device having means for aligning a cylinder barrel
US4827833A (en) * 1982-09-03 1989-05-09 Linde Aktiengesellschaft Adjustable axial piston pump having a bearing pressure pocket located on one side of a rocker body
US5980216A (en) * 1996-12-13 1999-11-09 Zexel Corporation Variable capacity swash plate compressor having a retainer support plate
US20100300281A1 (en) * 2007-05-14 2010-12-02 Robert Bosch Gmbh Retaining segment

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739691A (en) * 1970-08-03 1973-06-19 W Bobier Fluid device
DE2521312B1 (de) * 1975-05-13 1976-07-22 Hydromatik Gmbh Schraegscheiben-schwenklager fuer eine hydraulische axialkolbenmaschine
DE2625298A1 (de) * 1976-06-04 1977-12-22 Linde Ag Fuehrungseinrichtung fuer den kaefig eines segmentwaelzlagers
DE3608940C1 (en) * 1986-03-18 1987-09-03 Reiff Peter Grain mill, in particular for the household

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409185A (en) * 1943-06-19 1946-10-15 Denison Eng Co Hydraulic apparatus
US2525498A (en) * 1944-08-15 1950-10-10 Vickers Armstrongs Ltd Radial pump or hydraulic motor
US2588866A (en) * 1944-09-14 1952-03-11 Jeffrey Mfg Co Hydraulic transmission of the swash plate type pump and motor, and control mechanism therefor
US2925046A (en) * 1957-05-02 1960-02-16 New York Air Brake Co Engine
US2945449A (en) * 1954-06-03 1960-07-19 Bendix Aviat Corp Hydraulic control pump
US3092034A (en) * 1959-02-18 1963-06-04 Kamper Motoren G M B H Axial piston engines
US3396670A (en) * 1966-10-10 1968-08-13 Sundstrand Corp Hydraulic pump or motor
US3426686A (en) * 1966-04-04 1969-02-11 Ulrich Mfg Co Pump

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409185A (en) * 1943-06-19 1946-10-15 Denison Eng Co Hydraulic apparatus
US2525498A (en) * 1944-08-15 1950-10-10 Vickers Armstrongs Ltd Radial pump or hydraulic motor
US2588866A (en) * 1944-09-14 1952-03-11 Jeffrey Mfg Co Hydraulic transmission of the swash plate type pump and motor, and control mechanism therefor
US2945449A (en) * 1954-06-03 1960-07-19 Bendix Aviat Corp Hydraulic control pump
US2925046A (en) * 1957-05-02 1960-02-16 New York Air Brake Co Engine
US3092034A (en) * 1959-02-18 1963-06-04 Kamper Motoren G M B H Axial piston engines
US3426686A (en) * 1966-04-04 1969-02-11 Ulrich Mfg Co Pump
US3396670A (en) * 1966-10-10 1968-08-13 Sundstrand Corp Hydraulic pump or motor

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE32373E (en) * 1970-08-03 1987-03-17 Dana Corporation Fluid device having means for aligning a cylinder barrel
US3868889A (en) * 1970-08-03 1975-03-04 Oilgear Co Fluid device having means for aligning a cylinder barrel
US3779137A (en) * 1971-09-27 1973-12-18 Gen Motors Corp Hydrostatic tilt box bearing
US3991658A (en) * 1972-06-20 1976-11-16 Bobier Wilfred S Fluid device having sintered metal components
US3955475A (en) * 1974-10-04 1976-05-11 Daikin Kogyo Co., Ltd. Axial piston power transmission
US4444092A (en) * 1981-04-02 1984-04-24 Messier-Hispano-Bugatli (SA) Hydraulic pump
US4515067A (en) * 1981-09-09 1985-05-07 Linde Aktiengesellschaft Adjustable axial piston machines
US4827833A (en) * 1982-09-03 1989-05-09 Linde Aktiengesellschaft Adjustable axial piston pump having a bearing pressure pocket located on one side of a rocker body
US4627330A (en) * 1984-12-11 1986-12-09 Sundstrand Corporation Unitary bearing retainer for a swashplate bearing
WO1986003547A1 (en) * 1984-12-11 1986-06-19 Sundstrand Corporation Unitary bearing retainer for a swashplate bearing
US5980216A (en) * 1996-12-13 1999-11-09 Zexel Corporation Variable capacity swash plate compressor having a retainer support plate
US20100300281A1 (en) * 2007-05-14 2010-12-02 Robert Bosch Gmbh Retaining segment
US8555773B2 (en) * 2007-05-14 2013-10-15 Robert Bosch Gmbh Retaining segment

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Publication number Publication date
DE1812743A1 (de) 1969-07-03
FR1553922A (enrdf_load_stackoverflow) 1969-01-17

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