NL2014672B1 - Hydraulic fluid distributor and hydraulic fluid distributing method. - Google Patents

Hydraulic fluid distributor and hydraulic fluid distributing method. Download PDF

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Publication number
NL2014672B1
NL2014672B1 NL2014672A NL2014672A NL2014672B1 NL 2014672 B1 NL2014672 B1 NL 2014672B1 NL 2014672 A NL2014672 A NL 2014672A NL 2014672 A NL2014672 A NL 2014672A NL 2014672 B1 NL2014672 B1 NL 2014672B1
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Netherlands
Prior art keywords
outlet
fluid
piston
cylinder
group
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NL2014672A
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Dutch (nl)
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NL2014672A (en
Inventor
Jacobus Reijersen Van Buuren Willem
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Forage Innovations Bv
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Priority to NL2014672A priority Critical patent/NL2014672B1/en
Priority to EP16165248.2A priority patent/EP3085960B1/en
Publication of NL2014672A publication Critical patent/NL2014672A/en
Application granted granted Critical
Publication of NL2014672B1 publication Critical patent/NL2014672B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2035—Cylinder barrels

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

A hydraulic fluid distributor supplies a first and a second group of hydraulic actuators (20, 21) with hydraulic fluid. A drive (7) rotates a first and a second fluid-supplying piston-cylinder unit (1 0, 11) with respect to a plate (3) around a rotating axis (CA). A first group of outlet apertures ( 1.x) and a second group of outlet apertures (2.x) are cut into the plate (3). Fluid is supplied to a hydraulic actuator (20, 21) if the cylinder outlet (13, 14) of a piston-cylinder unit ( 1 0, 11) overlaps with an outlet aperture ( 1.x, 2.x) in the plate (3). The outlet apertures (2.x) of the second outlet group have a smaller distance to the rotating axis (CA) than the outlet apertures (1.x) of the first outlet group.

Description

Hydraulic fluid distributor and hydraulic fluid distributing method FIELD OF THE INVENTION
The invention refers to a hydraulic fluid distributor and a method for distributing hydraulic fluid onto two groups of hydraulic actuators, in particular for supplying fluid to two parallel piston-cylinder units of an agricultural harvester.
BACKGROUND OF THE INVENTION
In particular on board of an agricultural harvester (baler, loader wagon, field chopper, combine harvester, or swather, e.g.) several parts are to be moved by a respective pair of hydraulic actuators, e.g. by two parallel piston-cylinder units. At every time point both actuators should be supplied with substantially the same amount of fluid. A hydraulic fluid distributor solves this task. US 4,549,466 discloses a split-type oil hydraulic piston pump with a cylinder block 1. The cylinder block 1 can rotate jointly with a rotating shaft 6. Several pistons 3 are fitted into several cylinder bores 2 which are disposed concentrically around the shaft 6. Several cylinder chambers 4 are provided between the pistons 3 and the walls of the bores 2. The cylinder block 1 can rotate with respect to a valve plate 8 mounted at a valve body 7. A suction slot 9 in the valve plate 8 always opens to a suction port 11 in the valve body 7. Several delivery slots 10_1, 10_2, 10_2 in the valve plate 8 always opens to several delivery ports 12_1, 12_2, 12_3 in the valve body 7, cf. Fig. 2. The delivery ports 12_1, 12_2, 12_3 are in fluid communication with hydraulic actuators A_1, A_2 which are to be supplied with fluid. A hydraulic fluid is supplied through the suction port 11 into the cylinder chambers and is equally distributed onto the delivery ports 12_1, 12_2, 12_3. JPS 50-083803 A2 discloses a hydraulic axial pump with two delivery slots B, C. By means of these two delivery slots B, C hydraulic flow is shared onto two hydraulic actuators.
SUMMARY OF THE INVENTION A problem solved by the invention is to provide a hydraulic fluid distributor with the features of the preamble of claim 1 and a hydraulic fluid distributing method with the features of the preamble of claim 13 wherein both groups of actuators can be supplied with substantially the same amount of fluid or with a given ratio of fluid amounts and wherein the work of the fluid distributor is less influenced by variations during manufacturing and operation.
This problem is solved by a hydraulic fluid distributor with the features of claim 1 and by a hydraulic fluid distributing method with the features of claim 13. Preferred embodiments are specified in the depending claims.
The hydraulic fluid distributor supplies hydraulic fluid to a first group and to a second group of hydraulic actuators. Every actuator group comprises at least one hydraulic actuator.
The hydraulic fluid distributor comprises - a first and a second fluid-supplying piston-cylinder unit, - a plate, - a first connector group and a second connector group of fluid connecting devices, and - a drive.
The first fluid-supplying piston-cylinder unit comprises a first cylinder opening. The second fluid-supplying piston-cylinder unit comprises a second cylinder opening. A first group of outlet apertures and a second group of outlet apertures are cut into the plate. Every outlet group comprises several outlet apertures. These outlet apertures are positioned around an axis. The common or maximal distance between the outlet apertures of the second outlet group and this axis is smaller than the common or minimal distance between the outlet apertures of the first outlet group and this axis.
Every connecting device of the first connector group establishes a fluid communication between at least one outlet aperture of the first outlet group and at least one actuator of the first actuator group. Every connecting device of the second connector group establishes a fluid communication between at least one outlet aperture of the second outlet group and at least one actuator of the second actuator group.
Every piston-cylinder unit can be rotated around this axis around which the outlet apertures in the plate are positioned. The axis therefore serves as rotating axis. When rotating around the rotating axis, the first piston-cylinder unit fulfills the following constraint in every rotational position: The cylinder opening overlaps either with at least one outlet aperture of the first outlet group or with no outlet aperture but does not overlap with an outlet aperture of the second outlet group. In every rotational position the second piston-cylinder unit fulfills the following constraint: The cylinder opening overlaps either with at least one outlet aperture of the second outlet group or with no outlet aperture but does not overlap with an outlet aperture of the first outlet group.
The fluid distributor operates as follows: - The drive rotates both fluid-supplying piston-cylinder units with respect to the plate around the rotating axis around which the outlet apertures are positioned. - A fluid connection between a fluid-supplying piston-cylinder unit and a hydraulic actuator is established if the following two conditions are both fulfilled: a) The cylinder opening of this piston-cylinder unit overlaps with an outlet aperture in the plate.
b) This outlet aperture is in fluid connection with the hydraulic actuator. ADVANTAGES
Thanks to the invention every hydraulic actuator is supplied with the same amount of fluid. Or a given ratio between the fluid amounts supplied to the two actuator groups is kept. Thereby it is prevented that a part is not moved properly. In particular it is prevented that a moved part cants.
The invention enables a simple mechanical construction. The drive can rotate both fluid-supplying piston-cylinder units with a constant velocity. No acceleration and deceleration and no start-stop operation needs to be performed. The ratio of the fluid amounts supplied to the actuator groups depends on the cross-sectional areas of the two outlet aperture groups.
Thanks to the invention the outlet apertures of the first outlet group can be positioned at every desired rotational position in the plate. The outlet apertures of the second outlet group can also be positioned at every desired rotational position in the plate. This makes it easier to arrange the fluid connecting devices, in particular if the hydraulic fluid distributor is mounted on board of a vehicle.
Thanks to the invention the operation of the fluid distributor does not depend on the proper position of the outlet apertures in the disk. Therefore the operation is less subjected to variations during manufacturing the plate with the apertures and to variations in rotating the fluid-supplying piston-cylinder units.
PREFERED EMBODIMENTS
In one embodiment the distance between the cylinder opening of the second fluid-supplying piston-cylinder unit and the rotating axis is smaller than the distance between the cylinder opening of the first fluid-supplying piston-cylinder unit and the rotating axis.
In one embodiment every fluid-supplying piston-cylinder unit performs a sucking stroke and a supplying stroke while performing one rotation around the center axis. This embodiment enables a uniform operation of the fluid distributor. No further parts for distributing the fluid are required. Preferably the part with the apertures and the connecting devices are stationary parts. Only the fluid-supplying piston-cylinder units need to be rotated. This embodiment enables an even more robust construction.
Preferably the cylinder openings are cut into a further plate which can rotate around the center axis. The drive rotates the fluid-supplying piston-cylinder units and the rotatable plate around the center axis. This embodiment increases the reliability that the cylinder openings are properly positioned with respect to the outlet apertures in the plate. Preferably the plate with the outlet apertures and the rotatable plate with the cylinder openings extend in two parallel planes.
These and other aspects of the invention and of the preferred embodiment will be even more apparent from the detailed embodiment as described below and will be elucidated in detail there.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 shows the embodiment of the invention in a viewing direction perpendicular to the center axis of the stationary disk wherein both piston-cylinder units performs sucking strokes;
Fig. 2 shows the embodiment of Fig. 1 wherein both piston-cylinder units perform supplying strokes;
Fig. 3 shows the stationary disk in a viewing direction parallel to its center axis.
DETAILED DESCRIPTION OF EMBODIMENT
In the embodiment the invention is used on board of an agricultural harvester. This harvester is self-propelled or pulled by a motorized vehicle and - is pulled over ground, - picks up lose crop material, - conveys the picked-up crop material to a processing chamber or loading room, and - processes or stores the crop material in the chamber or room.
Examples for such an agricultural harvester are - a round baler which forms under pressure round-cylindrical bales in a drumshaped bale forming chamber, - a cuboid baler which forms under pressure cuboid bales in a pressing channel, and - a loader wagon which stores picked-up crop material in a loading room with a bottom conveyor.
Two parallel hydraulic actuators have to jointly move a harvester part, e.g. have to jointly - lift the feeding channel bottom of a harvester, - pivot a tensioning rocker for pressing belts, - pivot a sledge assembly for pressing rollers, - pivot a sidewall of a cuboid baler, - open the tailgate of a round baler, - lift a bottom ramp or chute of a cuboid baler, or - pivot a front wall or discharge wall of a loader wagon.
This movement must be performed against the expanding force of compressed crop material.
In order to perform the movement properly, both actuators must be supplied with approximately the same amount of hydraulic fluid at every time of the movement.
Fig. 1 and Fig. 2 show the embodiment in a horizontal viewing direction. The first actuator comprises a first hydraulic piston-cylinder unit 20 and the second actuator a second hydraulic piston-cylinder unit 21. Fig. 1 and Fig. 2 show a fluid source 19 and the following parts of the hydraulic fluid distributor according to the embodiment of the invention: - a stationary disk 3 with a plurality of inlet apertures 4.1, 4.2, ... and two outlet groups of outlet apertures 1.1, 1.2, ...,2.1,2.2, ... (in detail shown in Fig. 3), - a rotatable disk 5, - a first piston-cylinder unit 10 with a piston 15 and a cylinder opening 14, - a second piston-cylinder unit 11 with a piston 16 and a cylinder opening 13, - a rocker arm 12 which is pivotally connected with both pistons 15, 16 and can pivot around a pivoting axis PA, - an oscillation-creating drive 6, - a rotation-creating drive 7, - a fluid connection 8.x (x =1, 2, ...) between the fluid source 19 and the inlet aperture 4.x, - a fluid connecting device 31 .x (x = 1,2, ...) for establishing a fluid connection between the outlet aperture 1 .x and the first actuator 20, and - a fluid connecting device 32.x for establishing a fluid connection between the outlet aperture 2.x and the second actuator 21.
The disks 3, 5 extend in two parallel planes which are perpendicular to the drawing planes of Fig. 1 and Fig. 2. The disk 3 serves as the plate of the claims. The pivoting axis PA of the rocker arm 12 is also perpendicular to the drawing planes of Fig. 1 and Fig. 2. The piston 15 separates a base-side chamber 18 from a rod-side chamber. The piston 16 separates a base-side chamber 17 from a rod-side chamber.
The cylinder openings 13, 14 are cut into the rotatable disk 5. The outlet apertures 1.x, 2.x and the inlet apertures 4.x are cut into the stationary disk 3. The center axis CA (in the drawing planes of Fig. 1 and Fig. 2) forms the common middle axis of the stationary disk 3 and of the rotatable disk 5.
Fig. 3 shows the stationary disk 3 in a viewing direction parallel to the center axis CA. The outlet apertures 1.1, 1.2, ... of the first outlet group and the outlet apertures 2.1, 2.2, ... of the second outlet group are positioned in the upper half of the stationary disk 3 above the line 36 through the center axis CA. Several inlet apertures 4.1, 4.2, ... are positioned in the lower half below the line 36. In the embodiment the entire cross-sectional area of the outlet apertures 1.1, 1.2, ... of the first outlet group is equal to the entire cross-sectional area of the outlet apertures 2.1,2.2, ... of the second outlet group.
The cylinder openings 13, 14 are cut into the rotatable disk 5. The cylinder opening 14 and every outlet aperture 1.x has a distance d1 to the center axis CA. The cylinder opening 13 and every outlet aperture 2.x has a distance d2 to the center axis CA. The distance d1 is larger than the distance d2. More precisely: The respective center point of an outlet aperture 1 .x (x = 1,2, ...) has the distance d1 to the center axis CA. The respective center point of an outlet aperture 2.x has the distance d2 to the center axis CA.
In the embodiment the outlet apertures 1.1, 1.2, ... are positioned in an outer torus 41 which is defined by the circumferential surface 51 of the disk 3 and by an outer circle 52. The outlet apertures 2.1, 2.2, ... are positioned in an inner torus 42 which is defined by the outer circle 52 and an inner circle 53 in the interior of the outer circle 52. The outlet apertures 1.1, 1.2, ... are therefore positioned outside of the outer circle 52 and the outlet apertures 2.1,2.2, ... inside of it.
In one embodiment the overall cross-section area of the outlet apertures 1.1, 1.2, ... of the first outlet group is substantially equal to the overall cross-section area of the outlet apertures 2.1,2.2, ... of the second outlet group.
The rotation-creating drive 7 rotates the following parts around the center axis CA: - the rotatable disk 5, - the two piston-cylinder units 10, 11, - the rocker arm 12, and - the oscillation-creating drive 6.
Preferably the rotation-creating drive 7 rotates these parts in a continuous operation with constant velocity - at least as long as the actuator 20, 21 are to be supplied with fluid. The cylinders of the piston-cylinder units 10, 11 do not perform a movement relative to the rotatable disk 5 while being rotated.
The oscillation-creating drive 6 oscillates the rotated rocker arm 12 around the pivoting axis PA which is perpendicular to the center axis CA and perpendicular to the drawing plane of Fig. 1 and Fig. 2. In place of an oscillation-creating drive 6 a guiding rail for the rocker arm 12 can be used. This guiding rail (not shown) urges the rotated rocker arm 12 to oscillate around the pivoting axis PA when being rotated around the center axis CA. Both implementations (drive 6 or guiding rail) force the rocker arm 12 to rotate around the center axis CA and to oscillate around the pivoting axis PA while being rotated around the center axis CA.
As already mentioned the rocker arm 12 is rotated around the center axis CA by the drive 7. When performing one full rotation around the center axis CA, the rocker arm 12 is moved such that both piston-cylinder units 10, 11 perform one sucking stroke and one supplying stroke. The sucking stroke is performed while both cylinder openings 13,14 are positioned adjacent to the lower half of the stationary disk 3 (below the line 36 in Fig. 3). The supplying stroke is performed while both cylinder openings 13, 14 are positioned sufficiently adjacent to the upper part (above the line 36). The two cylinder openings 13, 14 are positioned close to each other. In the embodiment the piston-cylinder units 10, 11 have substantial the same dimensions.
Fig. 1 illustrates a sucking stroke. Every cylinder opening 13, 14 serves as a cylinder inlet. In the embodiment the size of every inlet aperture 4.x is sufficiently big such that every cylinder opening 13, 14 temporarily overlaps with the inlet aperture 4.x during a sucking stroke. If the cylinder inlet 13, 14 overlaps with an inlet aperture 4.x (x = 1,2,...), hydraulic fluid is sucked out of the fluid supply 19 and is guided through the fluid connection 8.x and the inlet aperture 4.x and the cylinder inlet 13, 14 into the base-side chamber 17, 18 of the piston-cylinder unit 10, 11. The arrows in Fig. 1 and Fig. 2 illustrate the direction in which the fluid flows.
Fig. 2 shows a supplying stroke. Every cylinder opening 13, 14 serves as a cylinder outlet. If the cylinder outlet 14 of the first piston-cylinder unit 10 overlaps with an outlet aperture 1.x of the first outlet group, the piston 15 presses fluid out of the base-side chamber 17 through the cylinder outlet 14, the outlet aperture 1.x, and the fluid connection 31.x to the first actuator 20. Thereby the first actuator 20 is supplied with fluid. If the cylinder outlet 13 of the second piston-cylinder unit 11 overlaps with an outlet aperture 2.x of the second outlet group, the piston 16 presses fluid out of the base-side chamber 18 through the cylinder outlet 13, the outlet aperture 2.x, and the fluid connection 32.x to the second actuator 21. Thereby the second actuator 21 is supplied with fluid.
Thanks to the differing distances d1, d2 the first cylinder outlet 14 never overlaps with a second outlet aperture 2.x and the second cylinder outlet 13 never overlaps with a first outlet aperture 1 .x. Therefore the first actuator 20 is supplied with fluid pressed out of the base-side chamber 17. The second actuator 21 is supplied with fluid pressed out of the base-side chamber 18.
In the embodiment the distance between the two cylinder openings 13, 14 is so small that at every time point either both piston-cylinder units 10, 11 perform a sucking stroke or both perform a supplying stroke. If the amounts of fluid supplied to the two actuators 20, 21 may temporarily slightly differ, the distance between the two cylinder openings 13, 14 can be larger such that it is possible that one piston-cylinder unit 10, 11 performs a sucking stroke and the other piston-cylinder unit 10, 11 performs at the same time a supplying stroke.
In the embodiment as disclosed above both actuators 20, 21 are supplied with substantially the same amount of fluid during a supplying stroke. It is possible to supply the first actuator 20 with a fluid amount of x and the second actuator 21 with a fluid amount of y whereas x significantly differs from y.
This embodiment can be implemented by differing overall cross-section areas of the outlet apertures 1.1, 1.2, ... and 2.1,2.2, ..., resp.: The outlet apertures 1 .x, 2.x are constructed such that A.1, the overall cross-section area of the outlet apertures 1.1, 1.2, ... of the first outlet group and A.2, the overall cross-section area of the outlet apertures 2.1,2.2, ... of the second outlet group, fulfill the constraint that A. 1 /A.2 equals x/y.
Reference signs used in the claims will not limit the scope of the claimed invention. The term “comprises” does not exclude other elements or steps. The articles “a”, “an”, and “one” do not exclude a plurality of elements. Features specified in several depending claims may be combined in an advantageous manner.
LIST OF REFERENCE SIGNS

Claims (14)

1. Hydraulische fluïdumverdeler voor het voorzien van eerste en tweede groepen hydraulische actuators (20, 21) van hydraulisch fluïdum, waarbij de hydraulische fluïdumverdeler het volgende omvat: - eerste en tweede draaibaar gemonteerde fluïdum toevoerende zuiger/cilinder-eenheden (10, 11) die elk een cilinderopening (13, 14) omvatten, - een plaat (3) met eerste en tweede uitlaatgroepen van uitlaatopeningen (3.x, 2.x), - eerste en tweede aansluitgroepen van fluïdumaansluitinrichtingen (31.x, 30.x), en - een aandrijving (7) voor het roteren van beide fluïdum toevoerende zuiger/cilinder-eenheden (10, 11) ten opzichte van de plaat (3) om een gemeenschappelijke rotatie-as (CA), waarbij elke aansluitinrichting (31.x) van de eerste aansluitgroep een fluïdumcommunicatie tot stand brengt tussen - ten minste één uitlaatopening (1 .x) van de eerste uitlaatgroep en - ten minste één actuator (20) van de eerste actuatorgroep, waarbij elke aansluitinrichting (30.x) van de tweede aansluitgroep een fluïdumcommunicatie tot stand brengt tussen - ten minste één uitlaatopening (2.x) van de tweede uitlaatgroep en - ten minste één actuator (21) van de tweede actuatorgroep waarbij elke fluïdum toevoerende zuiger/cilinder-eenheid (10, 11) is ingericht om hydraulisch fluïdum uit te stoten door zijn betreffende cilinderopening (13, 14), en waarbij een fluïdumverbinding tussen een fluïdum toevoerende zuiger/cilinder-eenheid (10, 11) en een hydraulische actuator (20, 21) tot stand wordt gebracht - als de cilinderopening (13, 14) van deze zuiger/cilinder-eenheid (10, 11) met een uitlaatopening (1.x, 2.x) overlapt en - als deze uitlaatopening (1.x, 2.x) in fluïdumverbinding (31.x, 32.x) met de hydraulische actuator (20, 21) staat, met het kenmerk dat de gemeenschappelijke of maximale afstand (d2) tussen de uitlaatopeningen (2.x) van de tweede uitlaatgroep en de rotatie-as (CA) kleiner is dan de gemeenschappelijke of minimale afstand (d1) tussen de uitlaatopeningen (1.x) van de eerste uitlaatgroep en de rotatie-as (CA), waarbij de cilinderopening (14) van de eerste zuiger/cilinder-eenheid (10) in elke rotatiepositie ofwel met ten minste één uitlaatopening (1.x) van de eerste uitlaatgroep of met geen uitlaatopening overlapt, en waarbij de cilinderopening (13) van de tweede zuiger/cilinder-eenheid (11) in elke rotatiepositie ofwel met ten minste één uitlaatopening (2.x) van de tweede uitlaatgroep of met geen uitlaatopening overlapt.A hydraulic fluid distributor for providing first and second groups of hydraulic actuators (20, 21) with hydraulic fluid, the hydraulic fluid distributor comprising: - first and second rotatably mounted fluid-supplying piston / cylinder units (10, 11) each comprise a cylinder opening (13, 14), - a plate (3) with first and second outlet groups of outlet openings (3.x, 2.x), - first and second connection groups of fluid connection devices (31.x, 30.x), and - a drive (7) for rotating both fluid-supplying piston / cylinder units (10, 11) relative to the plate (3) about a common axis of rotation (CA), each connecting device (31.x) of the first connection group establishes fluid communication between - at least one outlet opening (1. x) of the first outlet group and - at least one actuator (20) of the first actuator group, each connection device (30.x) of the second connection group call establishes a fluid communication between - at least one outlet opening (2.x) of the second outlet group and - at least one actuator (21) of the second actuator group with each fluid supply piston / cylinder unit (10, 11) arranged for ejecting hydraulic fluid through its respective cylinder opening (13, 14), and wherein a fluid communication between a fluid-supplying piston / cylinder unit (10, 11) and a hydraulic actuator (20, 21) is established - if the cylinder opening (13, 14) of this piston / cylinder unit (10, 11) overlaps with an outlet opening (1.x, 2.x) and - if this outlet opening (1.x, 2.x) is in fluid communication (31). x, 32.x) with the hydraulic actuator (20, 21), characterized in that the common or maximum distance (d2) between the outlet openings (2.x) of the second outlet group and the axis of rotation (CA) is smaller is then the common or minimum distance (d1) between the outlet openings (1.x) of the first outlet group and the axis of rotation (CA), wherein the cylinder opening (14) of the first piston / cylinder unit (10) in each rotational position either with at least one outlet opening (1.x) of the first outlet group or with no outlet opening overlaps, and wherein the cylinder opening (13) of the second piston / cylinder unit (11) overlaps in each rotational position either with at least one outlet opening (2.x) of the second outlet group or with no outlet opening. 2. Hydraulische fluïdumverdeler volgens conclusie 1, met het kenmerk dat de afstand (d2) tussen de cilinderopening (13) van de tweede zuiger/cilinder-eenheid (11) en de rotatie-as (CA) kleiner is dan de afstand (d1) tussen de cilinderopening (14) van de eerste zuiger/cilinder-eenheid (10) en de rotatie-as (CA).Hydraulic fluid distributor according to claim 1, characterized in that the distance (d2) between the cylinder opening (13) of the second piston / cylinder unit (11) and the axis of rotation (CA) is smaller than the distance (d1) between the cylinder opening (14) of the first piston / cylinder unit (10) and the axis of rotation (CA). 3. Hydraulische fluïdumverdeler volgens één der voorgaande conclusies, met het kenmerk dat de uitlaatopeningen (1.x) van de eerste uitlaatgroep zich in een eerste torus (41) rond de rotatie-as (CA) bevinden en de uitlaatopeningen (2.x) van de tweede uitlaatgroep zich in een tweede torus (42) rond de rotatie-as (CA) bevinden, waarbij de tweede torus (42) zich aan de binnenkant van de eerste torus (41) bevindt.Hydraulic fluid distributor according to one of the preceding claims, characterized in that the outlet openings (1.x) of the first outlet group are located in a first torus (41) around the axis of rotation (CA) and the outlet openings (2.x) of the second outlet group are in a second torus (42) around the axis of rotation (CA), the second torus (42) being on the inside of the first torus (41). 4. Hydraulische fluïdumverdeler volgens één der voorgaande conclusies, met het kenmerk dat de uitlaatopeningen (1.x) van de eerste uitlaatgroep zich aan de binnenkant van een eerste cirkel (51) rond de rotatie-as (CA) bevinden, en de uitlaatopeningen (2.x) van de tweede uitlaatgroep zich aan de buitenkant van een tweede cirkel (53) rond de rotatie-as (CA) bevinden, waarbij de tweede cirkel (53) zich aan de binnenkant van de eerste cirkel (51) bevindt.Hydraulic fluid distributor according to one of the preceding claims, characterized in that the outlet openings (1.x) of the first outlet group are located on the inside of a first circle (51) around the axis of rotation (CA), and the outlet openings ( 2.x) of the second outlet group are on the outside of a second circle (53) about the axis of rotation (CA), the second circle (53) being on the inside of the first circle (51). 5. Hydraulische fluïdumverdeler volgens conclusie 4, met het kenmerk dat de randen van de uitlaatopeningen (1.x) van de eerste uitlaatgroep de eerste cirkel (52) kruisen en/of de randen van de uitlaatopeningen (2.x) van de tweede uitlaatgroep de tweede cirkel (53) kruisen.A hydraulic fluid distributor according to claim 4, characterized in that the edges of the outlet openings (1.x) of the first outlet group cross the first circle (52) and / or the edges of the outlet openings (2.x) of the second outlet group cross the second circle (53). 6. Hydraulische fluïdumverdeler volgens één der voorgaande conclusies, met het kenmerk dat de afstand tussen twee naast elkaar gelegen uitlaatopeningen (1.x, 2.x) groter is dan de maximale diameter van deze uitlaatopeningen.A hydraulic fluid distributor according to any one of the preceding claims, characterized in that the distance between two adjacent outlet openings (1.x, 2.x) is greater than the maximum diameter of these outlet openings. 7. Hydraulische fluïdumverdeler volgens één der voorgaande conclusies, met het kenmerk dat elke fluïdum toevoerende zuiger/cilinder-eenheid (10, 11) een holte (17, 18) omvat, waarbij de aandrijving (7) is ingericht om beide fluïdum toevoerende zuiger/cilinder-eenheden (10, 11) ten minste één volledige rotatie te laten uitvoeren om de middenas (CA), waarbij een zuigeractuator (12) is ingericht om elke fluïdum toevoerende zuiger/cilinder-eenheid (10, 11) tijdens een volledige rotatie - een zuigslag om hydraulisch fluïdum in de betreffende holte (17, 18) ervan te zuigen en - een toevoerslag om hydraulisch fluïdum uit de betreffende holte (17, 18) ervan te persen.Hydraulic fluid distributor as claimed in any of the foregoing claims, characterized in that each fluid-supplying piston / cylinder unit (10, 11) comprises a cavity (17, 18), the drive (7) being arranged around both fluid-supplying piston / having cylinder units (10, 11) perform at least one full rotation about the center axis (CA), a piston actuator (12) being arranged to accommodate each fluid-supplying piston / cylinder unit (10, 11) during a full rotation a suction stroke for sucking hydraulic fluid into its respective cavity (17, 18) and - a supply stroke for pressing hydraulic fluid out of its respective cavity (17, 18). 8. Hydraulische fluïdumverdeler volgens conclusie 7, met het kenmerk dat de hydraulische verdeler het volgende omvat: - een tuimelarm (12) verbonden met beide fluïdum toevoerende zuiger/cilinder-eenheden (10, 11) en - een verdere inrichting (6), waarbij de verdere inrichting (6) is ingericht om de tuimelarm (12) om een dwars op de middenas (CA) staande as (PA) te laten oscilleren, hetgeen ertoe leidt dat elke zuiger/cilinder-eenheid (10, 11) een zuigslag en een toevoerslag uitvoert.A hydraulic fluid distributor according to claim 7, characterized in that the hydraulic distributor comprises: - a rocker arm (12) connected to both fluid-supplying piston / cylinder units (10, 11) and - a further device (6), wherein the further device (6) is adapted to cause the rocker arm (12) to oscillate about an axis (PA) extending transversely to the center axis (CA), which leads to each piston / cylinder unit (10, 11) having a suction stroke and performs a feed report. 9. Hydraulische fluïdumverdeler volgens conclusie 7 of conclusie 8, met het kenmerk dat ten minste één inlaatopening (4.x) in de plaat (3) is uitgesneden en een fluïdumverbinding tot stand wordt gebracht tussen - de of ten minste één inlaatopening (4.x) in de plaat (3) en - een hydraulische fluïdumbron (19), waarbij de inlaatopening (4.x) zich voor het tot stand brengen van een fluïdumverbinding bevindt tussen - de hydraulische fluïdumbron (19) en - de betreffende holte (17, 18) via de inlaatopening (4.x) als de fluïdum toevoerende zuiger/cilinder-eenheid (10, 11) een zuigslag uitvoert.A hydraulic fluid distributor according to claim 7 or claim 8, characterized in that at least one inlet opening (4.x) is cut out in the plate (3) and a fluid connection is established between the or at least one inlet opening (4). x) in the plate (3) and - a hydraulic fluid source (19), the inlet opening (4.x) for establishing a fluid connection being located between - the hydraulic fluid source (19) and - the relevant cavity (17) , 18) via the inlet opening (4.x) when the fluid-supplying piston / cylinder unit (10, 11) performs a suction stroke. 10. Hydraulische fluïdumverdeler volgens één der voorgaande conclusies, met het kenmerk dat de hydraulische distributor een verdere plaat (5) omvat die draaibaar is om de middenas (CA), waarbij de cilinderopeningen (13, 14) in de draaibare plaat (5) zijn gesneden en waarbij de aandrijving (7) is ingericht om de draaibare plaat (5) samen met de fluïdum toevoerende zuiger/cilinder-eenheden (10, 11) om de middenas (CA) te roteren.A hydraulic fluid distributor according to any one of the preceding claims, characterized in that the hydraulic distributor comprises a further plate (5) that is rotatable about the center axis (CA), the cylinder openings (13, 14) being in the rotatable plate (5) and wherein the drive (7) is arranged to rotate the rotary plate (5) together with the fluid-supplying piston / cylinder units (10, 11) about the center axis (CA). 11. Hydraulische fluïdumverdeler volgens één der voorgaande conclusies, met het kenmerk dat de plaat (3) zich in een vlak uitstrekt dat loodrecht op de rotatie-as (CA) staat.A hydraulic fluid distributor according to any one of the preceding claims, characterized in that the plate (3) extends in a plane perpendicular to the axis of rotation (CA). 12. Agrarische oogstmachine omvattende - een eerste actuatorgroep met ten minste één eerste actuator (20), - een tweede actuatorgroep met ten minste één tweede actuator (21), en - een hydraulische fluïdumverdeler volgens één der voorgaande conclusies om beide actuatorgroepen (20, 21) van hydraulisch fluïdum te voorzien.An agricultural harvesting machine comprising - a first actuator group with at least one first actuator (20), - a second actuator group with at least one second actuator (21), and - a hydraulic fluid distributor according to any one of the preceding claims around both actuator groups (20, 21 ) with hydraulic fluid. 13. Verdeelwerkwijze voor hydraulisch fluïdum voor het voorzien van hydraulisch fluïdum aan eerste en tweede groepen hydraulische actuators (20, 21), waarbij de werkwijze wordt uitgevoerd met behulp van een hydraulische fluïdumverdeler, omvattende - eerste en tweede draaibaar gemonteerde fluïdum toevoerende zuiger/cilinder-eenheden (10, 11), elk omvattende een cilinderopening (13, 14), - een plaat (3) met eerste en tweede uitlaatgroepen van uitlaatopeningen (3.x, 2.x), - eerste en tweede aansluitgroepen van fluïdumaansluitinrichting (31 .x, 30.x), en - een aandrijving (7), waarbij elke aansluitinrichting (31.x) van de eerste aansluitgroep een fluïdumcommunicatie tot stand brengt tussen - ten minste één uitlaatopening (1 .x) van de eerste uitlaatgroep en - ten minste één actuator (20) van de eerste actuatorgroep, waarbij elke aansluitinrichting (30.x) van de tweede aansluitgroep een fluïdumcommunicatie tot stand brengt tussen - ten minste één uitlaatopening (2.x) van de tweede uitlaatgroep en - ten minste één actuator (21) van de tweede actuatorgroep waarbij de werkwijze de stappen omvat dat de aandrijving (7) beide fluïdum toevoerende zuiger/cilinder-eenheden (10, 11) ten opzichte van de plaat (3) roteert om een gemeenschappelijke rotatie-as (CA), elke fluïdum toevoerende zuiger/cilinder- eenheid (10, 11) de neiging heeft om hydraulisch fluïdum uit te stoten via de betreffende cilinderopening (12, 14) ervan, een fluïdumcommunicatie tussen een zuiger/cilinder-eenheid (10, 11) en een hydraulische actuator (20, 21) tot stand wordt gebracht - als de cilinderopening (13, 14) van deze zuiger/cilinder-eenheid (10, 11) met een uitlaatopening (1.x, 2.x) overlapt en - als deze uitlaatopening (1 .x, 2.x) in fluïdumverbinding (31 .x, 32.x) staat met de hydraulische actuator (20, 21), en deze hydraulische actuator (20, 21) van hydraulisch fluïdum wordt voorzien door deze zuiger/cilinder-eenheid (10, 11) als de fluïdumverbinding tot stand is gebracht, met het kenmerk dat de gemeenschappelijke of maximale afstand (d2) tussen de uitlaatopeningen (2.x) van de tweede uitlaatgroep en de rotatie-as (CA) kleiner is dan de gemeenschappelijke of minimale afstand (d1) tussen de uitlaatopeningen (1.x) van de eerste uitlaatgroep en de rotatie-as (CA), waarbij de stap dat de aandrijving (7) de fluïdum toevoerende zuiger/cilinder-eenheden (10, 11) roteert, de volgende stappen omvat: - op elk tijdstip de cilinder opening (14) van de eerste zuiger/cilinder-eenheid (10) met ofwel ten minste één uitlaatopening (1.x) van de eerste uitlaatgroep of met geen uitlaatopening overlapt en - op elk tijdstip de cilinderopening (13) van de tweede zuiger/cilinder-eenheid (11) met ten minste één uitlaatopening (2.x) van de tweede uitlaatgroep of met geen uitlaatopening overlapt.A hydraulic fluid distribution method for providing hydraulic fluid to first and second groups of hydraulic actuators (20, 21), the method being performed with a hydraulic fluid distributor comprising - first and second rotatably mounted fluid-supplying piston / cylinder means units (10, 11), each comprising a cylinder opening (13, 14), - a plate (3) with first and second outlet groups of outlet openings (3.x, 2.x), - first and second connection groups of fluid connection device (31. x, 30.x), and - a drive (7), wherein each connecting device (31.x) of the first connection group establishes a fluid communication between - at least one outlet opening (1.x) of the first outlet group and - at least one actuator (20) of the first actuator group, wherein each connection device (30.x) of the second connection group establishes a fluid communication between - at least one outlet opening (2.x) of the two the outlet group and - at least one actuator (21) of the second actuator group wherein the method comprises the steps that the drive (7) rotates both fluid-supplying piston / cylinder units (10, 11) relative to the plate (3) a common axis of rotation (CA), each fluid-supplying piston / cylinder unit (10, 11) tends to discharge hydraulic fluid through its respective cylinder opening (12, 14), a fluid communication between a piston / cylinder unit (10, 11) and a hydraulic actuator (20, 21) is established - if the cylinder opening (13, 14) of this piston / cylinder unit (10, 11) with an outlet opening (1.x, 2). x) overlaps and - if this outlet opening (1 .x, 2.x) is in fluid communication with the hydraulic actuator (20, 21), and this hydraulic actuator (20, 21) of hydraulic fluid is provided by this piston / cylinder unit (10, 11) when the fluid connection is established, with the characterized in that the common or maximum distance (d2) between the outlet openings (2.x) of the second outlet group and the rotation axis (CA) is smaller than the common or minimum distance (d1) between the outlet openings (1.x) of the first outlet group and the axis of rotation (CA), wherein the step that the drive (7) rotates the fluid supplying piston / cylinder units (10, 11) comprises the following steps: - the cylinder opening at any time ( 14) of the first piston / cylinder unit (10) with either at least one outlet opening (1.x) of the first outlet group or with no outlet opening overlapping and - at any time the cylinder opening (13) of the second piston / cylinder- unit (11) with at least one outlet opening (2.x) of the second outlet group or with no outlet opening. 14. Verdeelwerkwijze voor hydraulisch fluïdum volgens conclusie 13, met het kenmerk dat de stap waarbij de aandrijving (7) beide zuiger/cilinder-eenheden (10, 11) roteert, de stap omvat dat beide zuiger/cilinder-eenheden (10, 11) ten minste één volledige rotatie om de middenas (CA) uitvoeren, waarbij de hoeveelheid fluïdum die door de eerste zuiger/cilinder-eenheid (10) tijdens een volledige rotatie wordt uitgestoten in hoofdzaak gelijk is aan de hoeveelheid fluïdum die door de tweede zuiger/cilinder-eenheid (11) tijdens de volledige rotatie wordt uitgestoten.The hydraulic fluid distribution method according to claim 13, characterized in that the step wherein the drive (7) rotates both piston / cylinder units (10, 11) comprises the step that both piston / cylinder units (10, 11) perform at least one complete rotation about the center axis (CA), wherein the amount of fluid ejected by the first piston / cylinder unit (10) during a complete rotation is substantially equal to the amount of fluid emitted by the second piston / cylinder unit (11) is ejected during the entire rotation.
NL2014672A 2015-04-20 2015-04-20 Hydraulic fluid distributor and hydraulic fluid distributing method. NL2014672B1 (en)

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DE3026765A1 (en) * 1980-07-15 1982-02-11 Linde Ag, 6200 Wiesbaden AXIAL PISTON PUMP FOR TWO FLOWERS
US4549466A (en) 1983-04-27 1985-10-29 Kabushiki Kaisha Komatsu Seisakusho Split type oil hydraulic piston pump and pressurized oil feed circuit making use of the same pump
US7029241B2 (en) * 2002-04-26 2006-04-18 Patrick Wade Rousset Circumferential piston compressor/pump/engine (CPC/CPP/CPE); circumferential piston machines
DE102011077253A1 (en) * 2011-06-09 2012-12-13 Robert Bosch Gmbh Axial piston machine in swash plate design

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