EP1355068A1 - Vorrichtung zur Teilung oder zum Zusammenfügen einer Strömung - Google Patents

Vorrichtung zur Teilung oder zum Zusammenfügen einer Strömung Download PDF

Info

Publication number
EP1355068A1
EP1355068A1 EP03290899A EP03290899A EP1355068A1 EP 1355068 A1 EP1355068 A1 EP 1355068A1 EP 03290899 A EP03290899 A EP 03290899A EP 03290899 A EP03290899 A EP 03290899A EP 1355068 A1 EP1355068 A1 EP 1355068A1
Authority
EP
European Patent Office
Prior art keywords
primary
distribution
orifices
cylinder block
casing
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.)
Granted
Application number
EP03290899A
Other languages
English (en)
French (fr)
Other versions
EP1355068B1 (de
Inventor
Bernard Allart
Louis Bigo
Ante Bozic
Jacques Fontaine
Jean-Pierre Souply
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.)
Poclain Hydraulics Industrie
Original Assignee
Poclain Hydraulics Industrie
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 Poclain Hydraulics Industrie filed Critical Poclain Hydraulics Industrie
Publication of EP1355068A1 publication Critical patent/EP1355068A1/de
Application granted granted Critical
Publication of EP1355068B1 publication Critical patent/EP1355068B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • 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
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/10—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary
    • F04B1/107—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders
    • F04B1/1071—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders with rotary cylinder blocks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0644—Component parts
    • F03C1/0655—Valve means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/22—Reciprocating-piston liquid engines with movable cylinders or cylinder
    • F03C1/24—Reciprocating-piston liquid engines with movable cylinders or cylinder in which the liquid exclusively displaces one or more pistons reciprocating in rotary cylinders
    • F03C1/247—Reciprocating-piston liquid engines with movable cylinders or cylinder in which the liquid exclusively displaces one or more pistons reciprocating in rotary cylinders with cylinders in star- or fan-arrangement, the connection of the pistons with an actuated element being at the outer ends of the cylinders
    • 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
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/06—Control
    • F04B1/063—Control by using a valve in a system with several pumping chambers wherein the flow-path through the chambers can be changed, e.g. between series and parallel flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/22—Synchronisation of the movement of two or more servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/022—Flow-dividers; Priority valves

Definitions

  • the present invention relates to a device for dividing or joining a fluid flow comprising a casing which has at least one orifice primary capable of being crossed by a primary flow of fluid and several secondary orifices which can each be crossed by a secondary flow of fluid, and means for dividing the primary flow into secondary flows or to combine secondary flows into primary flow.
  • dividers of this type are relatively unreliable when the flow entering through the primary orifice varies significantly.
  • dividers of flow formed by several coupled gear motors we also know, for example from FR 2 199 836, dividers of flow formed by several coupled gear motors. This technology is reliable, but dividers of this type are expensive and bulky. In some applications, it is necessary to split a primary flow in addition to two secondary flows. For these applications, the flow dividers of the aforementioned type include at least three or more gear motors which are coupled together. In this case, the cost of these flow dividers and their size are excessive.
  • the device of the invention not only serves as a flow divider, dividing an incoming flow through the primary orifice into several outgoing flows through its secondary ports, but also of flow reunifier, combining several flows entering through the secondary orifices in a flow exiting through the primary port.
  • the invention aims to improve the aforementioned prior art by proposing a flow divider / unifier that is both simple and reliable.
  • the device comprises a cylinder block, mounted in relative rotation with respect to the housing around an axis of rotation and having a plurality of cylinders arranged radially relative to this axis, pistons being able to slide in the cylinders and cooperating, by their ends distant from the axis of rotation, with a wavy reaction cam integral in rotation with the housing, the cylinder block including a cylinder duct for each cylinder, by the way that this device comprises a fluid distributor, integral in rotation of the casing and comprising primary distribution conduits connected to the primary orifice, and secondary distribution conduits respectively connected to the different secondary ports and to the fact that each cylinder duct is suitable, during the relative rotation of the cylinder block and casing, to be alternately connected to a conduit primary distribution and a secondary distribution conduit.
  • the flow divider according to the invention therefore comes close by its structure of a radial piston hydraulic motor. It thus includes a cylinder block and a cam having a plurality of cam lobes. According to direction of rotation of the cylinder block, the device according to the invention can be used as a flow divider or as a debit.
  • the distributor is fixed in rotation relative to the cam, so that the different distribution conduits are associated with the different cam lobes. Indeed, for a given direction of rotation, the communication of a cylinder duct with a distribution duct always produces the same effect for the piston which slides in the cylinder connected to this cylinder conduit. Considered in this direction of rotation, each the cam lobe has a rising part and a falling part.
  • this direction of rotation is that in which the device is a divider of flow, a piston cooperates with the rising part of a cam lobe in moving radially outward when the cylinder duct of the cylinder in which this piston is placed is connected to the primary distribution duct, and the same piston then cooperates with the descending part of the same cam lobe when this cylinder duct is put in communication with a secondary distribution conduit.
  • the fluid contained in the cylinder of this piston is then expelled through the orifice secondary to which said secondary distribution duct is connected.
  • This secondary distribution orifice is said to be associated with the cam lobe considered since it is when a piston cooperates with this cam lobe that the fluid contained in the cylinder of this piston passes through this secondary orifice.
  • several secondary distribution conduits can be connected at the same secondary port, so that a group of at least one lobe of cam is associated with each secondary port.
  • each group of at least one lobe of cam associated with a secondary orifice is homokinetic, that is to say that the flow passing through this secondary orifice is constant and regular for a constant speed of rotation of the cylinder block relative to the casing.
  • the devices according to the invention also allow, in a single housing, large flows with a greater number of secondary flows in a reduced footprint and can operate at higher pressures with better performance.
  • each group of cam lobes associated with a secondary orifice behaves like an elementary entity which itself must be homokinetic. For example, when all cam lobes cover the same angular sector, and if the device includes n cam lobes (where n is an integer at least equal to 2), then a device comprising 2 n + 1 pistons and n secondary orifices each associated with one of the cam lobes, fulfills the condition according to which each cam lobe associated with a secondary port can be CV. In this configuration, for example for a device with four secondary ports and four identical cam lobes, imperatively provide at least nine pistons.
  • the device according to the invention can comprise a single orifice primary and several associated secondary orifices, each with a single lobe cam.
  • p being a number integer greater than 2
  • it divides the primary flow of fluid passing through the primary orifice in p secondary flows passing through, each an orifice secondary, or it combines in a single primary flow p secondary flows entering, each through a secondary orifice.
  • the secondary flows being all equal to each other if the cam lobes are identical.
  • the device of the invention can also conceive with the device of the invention of divide a primary flow into several unequal secondary flows, or to combine several unequal secondary flows into a single primary flow.
  • the device can for example comprise four cam lobes and only three secondary ports, i.e. two ports each associated with a cam lobe, and a third secondary orifice associated with the two lobes cam remaining.
  • the primary flow passing through the primary orifice can be divided into two secondary flows each corresponding to a quarter of this primary flow and in a third secondary flow corresponding to half the flow primary.
  • the device may include several primary orifices, while having advantages of secondary orifices than of orifices primary. So for example, it can split two incoming primary rates each by a primary orifice in four secondary flows leaving by four secondary ports, or combine these four secondary flows in two primary flow rates.
  • cam lobes which are not not identical, in angular cover and / or in profile, to obtain groups of cam lobes constituting homokinetic and able entities to provide regular but different rates in reports determined to be precise and suitable for their use.
  • the device also comprises means for deactivation capable of communicating the primary conduits and the secondary distribution conduits.
  • the device When all the primary and secondary distribution conduits communicate with each other, the device is deactivated and the flow is no longer divided in the reports imposed during activation, but is divided into according to the flow requirements called at the secondary orifices.
  • the device is placed on the discharge line of a pump used to power two motors each driving a wheel of a machine.
  • the interposition a flow divider between the supply or exhaust pipe motors and the pump line connected to it allows to supply the two motors with the same flow rate and to avoid therefore skating situations in which if one of the wheels patina, the motor driving this wheel "consumes" the entire flow driven back by the pump, and the vehicle can no longer move.
  • the wheel When a vehicle is turning in a bend, the wheel must be outer is driven at a speed faster than the inner wheel. It is for example for this reason that it can be interesting to deactivate the flow divider device.
  • the device can be interposed between the discharge line or suction of a pump and four supply lines or exhaust each connected to an engine driving one of the wheels the craft.
  • the device therefore divides into four determined secondary flow rates (for example equal, if the wheels have equal diameters), the flow primary pumped back or combines four equal secondary flows into a primary conduit drawn in by the pump.
  • the flow divider can be activated to avoid a situation of skating when operating in a straight line, on difficult terrain, of the craft. For road operation, you may wish to only partially deactivate the device, for example to negotiate turns.
  • each cam lobe is associated with a primary conduit and a secondary distribution conduit; the hole secondary of the device to which this secondary conduit of distribution is also associated with the same cam lobe.
  • the deactivation means are produced by the that primary and secondary distribution lines (or all of these conduits) are capable of being connected to a bore by openings disposed in this bore, and the device comprises a selector, disposed in this bore and able to be controlled between a first position in which it isolates these openings from each other and a second position in which he communicates with each other at least some of these openings.
  • This bore is for example formed in the distributor.
  • the device has stop means hydrostatic for the cylinder block.
  • the device is thus simplified, since no axial stop such only a pad is required to hold the cylinder block vis-à-vis an axial displacement, but that the pressure of the fluid circulating in the device is used to form a hydrostatic stop.
  • the device includes a pressure limiter suitable for communicating a secondary orifice with a pressure limitation to limit the pressure of the fluid passing through said secondary port.
  • a pressure relief valve can be a component of the divider or unifier device debit.
  • the device can include as many pressure relief valves as secondary ports.
  • the device preferably includes a single pressure which can be used to limit the pressure in the secondary ducts thanks to a set of valves, each subject to pressure of a secondary orifice and allowing the passage of the the secondary orifice towards a common enclosure upstream of the limiter pressure.
  • the pressure limiting conduit is connected to the primary orifice, which simplifies the constitution of the pressure relief valve.
  • the device comprises a speed sensor of rotation of the cylinder block with respect to the casing and a converter able to process the data captured by this sensor to determine the flow of fluid passing through the primary orifice or a secondary orifice in function of this speed and thus realize a flow meter.
  • This flowmeter is reliable and simple because it uses the most data reliable to know the flow discharged through the secondary orifices, which is the rotational speed of the cylinder block, the calculated flow being the product of this speed of rotation of the cylinder block by the cubic capacity considered.
  • the converter can be a simple calculator or a microprocessor in the memory of which entered the flow of fluid passing through each orifice secondary for a complete turn of the cylinder block. For each orifice secondary, this flow is a function of the number and conformation of the cam lobes associated with this orifice, as well as with the displacement of the cylinder block.
  • the cylinder block has a transverse face with marks and the sensor is arranged opposite this transverse face.
  • the marks can be formed by notches, teeth or others, located on the transverse face of the cylinder block, and the sensor can be formed by an inductive, magnetic or optical sensor, opposite from which scroll the marks during the rotation of the cylinder block.
  • the device 10 of Figures 1 and 2 comprises a housing in three parts, respectively 10A, 10B and 10C, fixed together by screws 12 passing through axial holes 13. Inside the casing is disposed a cylinder block 14 mounted with relative rotation relative to the casing opposite an axis of rotation A.
  • This cylinder block has a plurality of cylinders 16 arranged radially with respect to the axis A, in which are arranged pistons 18 capable of sliding in these cylinders. By their ends 18A distant from the axis of rotation A, the pistons can cooperate with a wavy reaction cam 11 made at the periphery internal part 10B of the housing.
  • the cylinder block 14 includes a cylinder duct 20 for each cylinder, this conduit being able to be put in communication successively with a primary orifice OP of the casing and with an orifice secondary of this housing.
  • a primary orifice OP of the casing and with an orifice secondary of this housing.
  • FIG. 1 only one secondary orifice OS4, present in the section plane, is shown. However, the positions of all the secondary ports OS1, OS2, OS3 and OS4 and also that of the orifice OP are indicated in broken lines in FIG. 2, although these holes are not in the section of this figure.
  • the device comprises a fluid distributor 22, which is integral in rotation of the casing by any appropriate means such as one or more pins 21, and which has 24P primary distribution conduits connected at the primary port OP.
  • the device also includes conduits 24S distribution side panels respectively connected to the different secondary ports OS1 to OS4.
  • the primary orifice OP is the orifice, on the end face of the part 10C of the casing, of an axial duct 26 which is formed in this part 10C.
  • This conduit 26 opens into a groove 28 which is formed between an axial face 10'C of the part 10C and an axial face 22 'of the distributor 22.
  • the 24P primary distribution conduits all open into this groove 28 to be connected to the primary orifice. They lead also in a transverse distribution face 22A of the distributor, in which they open through the primary distribution orifices 30P.
  • the cylinder block has a transverse face of communication 14A in which the cylinder conduits 20 open by communication ports 20A. Ports 30P and 20A are located at the same distance from the axis of rotation A, so that they can be set communication with each other during the relative rotation of the cylinder block and crankcase.
  • the transverse communication face 14A and the transverse distribution face 22A which are both perpendicular to the axis A, are placed in mutual support, for example at using compression springs 32 which constantly repel the distributor 22 against the cylinder block 14 while resting on the bottom of part 10C of the housing.
  • the groove 28 forms an enclosure which is delimited around an area distributor 22 into which the primary conduits of 24P distribution to be connected to the primary distributor OP.
  • conduits 24S and their orifices 30S are indicated; the positions of the conduits 24P and their orifices 30P are also indicated, although these are not visible in the section plane.
  • the cylinder duct 20 is connected to a primary 24P distribution duct.
  • the cylinder duct 20 is connected to a secondary duct of 24S distribution.
  • the 24S secondary distribution conduits are not not practiced in the distributor 22 but they are formed in the part 10A from the housing.
  • the cylinder block 14 has a transverse face end 14B which is opposite the transverse communication face 14A and which is in abutment against a bearing face 34 belonging to a element integral with the casing, which in this case is part 10A of the casing, an internal transverse face of which forms the bearing face 34.
  • At least some cylinder conduits 20 have a portion 20B which extends between the transverse faces 14A and 14B of the cylinder block 14 and which is open, in the transverse communication face 14A, by a communication port 20A and, in the transverse face end, by an end orifice 20C.
  • 24S secondary distribution openings open in the face support 34 by secondary distribution orifices 305 which are suitable for communicate with the end holes 20C during rotation relative of the cylinder block and the crankcase.
  • the orifices 20C and 30S are located at the same radial distance from axis A.
  • the cylinder ducts have a T shape with a radial branch which opens into the bottom of the cylinders 16 and an axial branch which forms the portion 20B and extends rectilinearly between the faces 14A and 14B of the cylinder block.
  • the device could perfectly include other secondary distribution conduits, arranged in the distributor 22 and opening on the one hand in the transverse face of distribution 22A by secondary distribution orifices suitable for communicate with communication ports during rotation relative of the cylinder block and the crankcase and on the other hand in the face opposite transverse of the distributor opposite secondary orifices made in part 10C of the housing.
  • the device of Figure 1 has stop means hydrostatic for cylinder block 14. More specifically, in the example shown, the bearing face 34 has a blind hole 34A located in manhole of each of the 30P distribution orifices which are arranged in the transverse distribution face 22A. In the example in Figure 1, all these distribution ports are the primary ports 30P, but it may not not always go that way. So when a cylinder duct communicates with one of these 30P distribution ports, it communicates also with one of these blind holes. This forms a room whose communication with the cylinder duct opens or closes as the communication of this cylinder duct with the orifice of distribution considered. This results in a balancing of pressures and axial forces on either side of the cylinder block.
  • the transverse distribution face 22A has a hole blind 23A located opposite each of the secondary orifices of 24S distribution which are arranged in the support face 34.
  • the device also includes a bearing 36 for taking up the radial forces which is formed by a bearing supported by a central stud 37 of part 10A of the housing. This bearing cooperates with the wall of a central bore 14 'of the cylinder block.
  • the sum of pressures in the secondary ports is four times the pressure in the primary port, since the flow primary is equal to four times each secondary flow.
  • axial support could be used, for example example by choosing a studded distributor of the type described, for a hydraulic motor, in FR 2 701 736.
  • the device of FIG. 1 also comprises a return orifice for OF leaks.
  • This is connected to the interior of the housing by a return of leaks which, in this case, includes a first section of conduit 38A which opens into the region of the cam 11, and a second section of conduit 38B which opens into the region of the interior space of the distributor 22, the latter having the shape of a ring.
  • the device of FIG. 1 also comprises a sensor 40 of the rotation speed of the cylinder block with respect to the casing. It is by example of an inductive sensor placed in a bore 41 of part 10A of the casing and held tightly in this part using a retaining assembly 42 comprising a screw. The end of the sensor found in relation to a region of the transverse end face of the cylinder block which has marks 44 angularly spaced from each other other.
  • the senor 40 can be connected to a converter which counts the number of marks 44 scrolling next to this sensor per unit of time (which gives the rotation speed of the cylinder block) and which deduces the flow of fluid through the various secondary orifices of the device, based on stored parameters, relative to the displacement of each elementary entity constituted by a group of one or more cam lobes associated with a secondary orifice.
  • the cam 11 has four lobes of cam, respectively 11A, 11B, 11C and 11D each having a ramp up and down ramp.
  • a primary distribution conduit 24P whose port 30P is shown in Figure 2
  • a conduit 24S secondary distribution including the 30S secondary distribution orifice is shown in Figure 2
  • the device 110 of FIG. 3 comprises means for deactivation capable of communicating the primary conduits of distribution 124P and secondary distribution conduits 124S. More specifically, the primary distribution pipes 124P have 125P openings which are arranged in a bore 122B of the distributor 122. Similarly, the secondary distribution conduits 124S have openings 125S which are also arranged in this bore 122B.
  • the device 110 comprises a selector 150, which is arranged in the bore 122B and which is suitable for being controlled between a first position, shown in Figure 3, in which it isolates the openings 125P and 125S from each other and a second position in which it causes at least some of these openings to communicate with each other.
  • a selector 150 which is arranged in the bore 122B and which is suitable for being controlled between a first position, shown in Figure 3, in which it isolates the openings 125P and 125S from each other and a second position in which it causes at least some of these openings to communicate with each other.
  • the external periphery of the selector 150 has a groove 152 which, in the second position of this selector in which it is moved in the direction of the arrow F, is in look at both 125P openings and 125S openings.
  • control means of movement of the selector 150 between its two positions includes elastic return means 154 which permanently recall this selector in its first position.
  • control means also include a hydraulic control 156 capable of being supplied with fluid under press to move the selector to its second position.
  • a pilot duct 158 is disposed in the part 110C of the casing and opens into the chamber 156 which, in the position of the selector 150 shown in Figure 3, has a minimum volume.
  • the selector 150 is in its first position.
  • the flow divider or unifier device is enabled by default.
  • all means for controlling the movement of the selector can be used, such as hydraulic means, mechanical, electromechanical or electronic, in particular for rendering progressive and / or staggered switching depending on the selector position 150.
  • deactivation devices can be provided individual of each flow division by interposing a selector between each secondary distribution conduit and a distribution conduit primary to allow direct communication between these conduits.
  • selectors can be constituted by known components such as piloted valves, logic valves or slide valves.
  • the secondary orifices of OS distribution are made in the same part 110C of the casing as the primary distribution orifice OP.
  • Secondary conduits of distribution 124S are provided in distributor 122 and open in its transverse distribution face 122A through the secondary orifices of 130S distribution capable of communicating with communication ports 120A during the relative rotation of the cylinder block and the casing.
  • the 124S conduits each include a first section 124S1 which is arranged in the distributor 122. It is this first section which is connected, by a radial branch, to the 125S opening located in bore 122B.
  • These distribution conduits also include a second section 124S2 which is formed in the part 110C of the casing.
  • This ring 160 forms a seat for a compression spring 132 which biases permanently the distributor pressing against the cylinder block. She cooperates tightly with a distributor cavity in which it is housed and constitutes a balancing stud dimensioned so that all of these studs allow the distributor to be balanced.
  • the device 110 has an OF leakage return opening into which a leak return pipe having two sections, 138A and 138B.
  • the device 110 includes a pressure limiter 170 which is capable of communicating a OS secondary port with pressure limiting conduit for limit the pressure of the fluid passing through this secondary orifice.
  • this pressure limiting conduit is connected to the primary port OP. More specifically, the pressure relief valve includes first 170S conduits which are capable of being connected each to one of the OS secondary ports, a second 170L conduit which can be connected to the pressure limiting duct and an enclosure 170E which is connected to each first duct 170S by a non-return valve 172 and which is connected to the second conduit 170L by a valve 174.
  • Each non-return valve 172 can open to communicate the first 170S conduit with which it cooperates with the enclosure 170E when the pressure in this first conduit becomes greater than the pressure in the enclosure.
  • the valve 174 can open to communicate this enclosure with the second duct 170L when the pressure in the enclosure reaches a predetermined threshold. More precisely, the valve 174, in its differential valve variant shown in figure 3, opens when the difference in pressures in the enclosure 170E and in the duct 170L reaches a predetermined threshold.
  • Other valve variants pressure limitation can be used.
  • the valve includes a body valve 181, which is arranged in a 110D element integral with the casing, in which the ducts 170L and 170S are formed, as well as enclosure 170E.
  • the valve body is sealed in a bore 182 of this element 110D, and its interior space can communicate with enclosure 170E through communications such as holes 184.
  • the first conduits 170S are able to be connected to the secondary ports OS by via the secondary distribution conduits 124S.
  • the housing portion 110A which has the bearing face 134 against which the extreme transverse face 114B of the cylinder block is in support has 186S connecting conduits which open in this face support by 186'S connection orifices capable of communicating with 120C end holes of the axial portions 120B of the conduits cylinder which cross the cylinder block right through, between its face of communication 114A and its transverse end face 114B during the relative rotation of the cylinder block and the crankcase, which allows 186S link lines to communicate with secondary lines distribution system 124S.
  • the second 170L pressure relief conduit 170 communicates with the main orifice OP by another connecting conduit 186L produced in part 110A of the casing, itself in communication with a primary distribution pipe 124P via a cylinder conduit 120.
  • the 186L conduit opens in the face support 134 of part 110A of the casing by a connection hole 186′L suitable to communicate with the orifices 120 during the rotation of the cylinder block.
  • the number of pistons at least equal to 2n + 1, n being the number of secondary ports, guarantees permanent communication between duct 170L and primary distribution duct 124P, by through the conduit 186L and at least one cylinder conduit 120.
  • the element 110D in which the valve 174 is placed is flanged on part 110A of the casing.
  • it could be an element forming an integral part of the housing.
  • the cylinder block 214 has an internal bore 214 ′ in which the cylinder conduits 220 open through orifices of communication 220A.
  • the dispenser comprises an axial portion 222 integral with the casing which extends in this bore 214 'of the cylinder block.
  • the distribution lines 224P and 224S open on the external periphery 222 ′ of this axial portion 222 into distribution orifices, 230P and 230S respectively.
  • Communication ports 220A and distribution orifices are able to be arranged facing one of the others during the relative rotation of the cylinder block and the crankcase.
  • the axial portion 222 which forms the dispenser is actually a axial extension of the part 210C of the casing which crosses the bore 214 'of the cylinder block and also a bore 210'A of the part 210A of the casing which then has a disc shape whose center is hollowed out.
  • the primary distribution pipes 224P are arranged in a star inside the distributor 222 being all connected to the main orifice OP by an axial section of common conduit, 224PA.
  • the secondary distribution conduits 224S are all connected respectively to a secondary port OS by a branch respective axial link 224SL.
  • connection between the bore 214 'of the cylinder block and the periphery external axial 222 'of the distributor 222 is sealed by two seals or annular segments 227 arranged respectively in two planes transverse between which extend the communication and distribution.
  • the cylinder block is guided axially by two simple friction washers 229 or needle stops.
  • Variant consists in replacing the seals 227 by two annular grooves intended for receive leaks and promote the formation of a hydrostatic bearing.
  • the device of Figure 4 further comprises a setting device in pressure of the interior space 273 of the casing capable of putting this space in communication with the primary or secondary orifice which is at the most low pressure.
  • This device includes non-return valves 292 arranged on pressurization ducts 290 connecting respectively the primary orifice OP and the secondary orifices OS in space 273 and authorizing the passage of the fluid only from the space 273 of the casing towards the primary or secondary port which is at the lowest pressure.
  • each pressurization conduit (there is one for each primary or secondary port), the valve 292 is interposed between the pressurization duct and the space 273 inside the casing surrounding the cylinder block, the seat of the valve being the edge of a pressurization 292 'which extends between each duct 290 and the space 273.
  • Each pressurization duct 290 is connected to a primary orifice OP or secondary OS respectively via the axial section common 224PA of primary distribution conduits or through a branch axial connection 224SL of a secondary distribution conduit.
  • the flow divider of the Figure 4 does not have a leak return pipe and operating pressure in space 273 increases due to leaks internal.
  • the fluid pressure in this space 273 becomes too that of the valves 292 which is located in the duct of pressurization 290 at the lowest pressure opens to allow the circulation of the fluid from space 273 towards this pressurization duct 290, therefore towards the primary or secondary orifice at the lowest pressure.
  • Springs 217 arranged in the cylinders 216 allow hold the pistons 218 against the cam 211 even when the piston 218 is subjected to its two ends, in its cylinder and in space 273, at substantially equal pressures.
  • the advantage of the device of FIG. 4 lies in the fact that the pistons 218 of the flow divider are thus subject to differences in lower pressure than when the leakage return pipe (generally at a pressure of the order of 1 bar) is present.
  • the pistons, and consequently cam 211, are then subjected to forces less important.
  • the performance and the service life of the device are thus increased.
  • the pistons of the divider flow are not intended to provide a couple of drive, as this is the case in an engine of neighboring structure.
  • the implementation crankcase pressure which in an engine can cause leaks at the rotating seals on the engine outlet, presents no difficulty for a flow divider without a shaft exit.
  • the cylinder block 314 of the Figure 5 shows an axial bore 314 'in which extends a portion axial 322 which forms the distributor.
  • Cylinder conduits 320 open into bore 314 'into communication openings 320A to which can be connected, during the relative rotation of the cylinder block and the dispenser, the 330P and 330S distribution ports on the distribution pipes 324P and 324S.
  • the distributor 322 formed by an axial portion of the part 310C of the housing, has a bore 322B in which are arranged 325P and 325S openings of the distribution ducts, respectively 324P and 324S.
  • a selector 350 which is able to occupy a first position, shown in FIG. 5, in which it isolates the 325P openings and the 325S openings and a second position, in which it is moved in the direction of arrow G, to make at least some of the openings communicate with each other 325P and 325S.
  • the external periphery of the distributor 350 has a groove 352 which can be arranged opposite openings 325P and 325S, themselves arranged between two planes transverse.
  • Selector 350 control means include a spring 354 constantly recalling it to its first position and a control chamber 356 capable of being supplied with fluid by a pilot line 358.
  • the 324P primary distribution conduits are all communication with the primary orifice OP by being connected to a groove annular 328 with which said port permanently communicates primary OP.
  • the 324S secondary distribution conduits are connected to the OS secondary openings by radial branches.
  • the device of FIG. 6 is now described, in which the same references, increased by 300 compared to FIG. 3, describe the same elements as in FIG. 3.
  • the cylinder block 414 is rotatably supported against the three-part casing 410A, 410B and 410C by a bearing taking up the radial and axial forces.
  • a bearing 436 with four contact points, which cooperates with an extension 435 of the cylinder block, located under part 410B of the casing.
  • the conduits cylinder 420 open into a transverse communication face 414A of the cylinder block, in communication openings 420A.
  • the hole primary OP of the device is connected to primary distribution conduits 424P via an axial duct 426 in communication with a groove 428 formed between the stepped axial periphery of the distributor 422 and the stepped axial periphery of part 410C of the casing.
  • the device 410 of FIG. 6 can be deactivated, partially or totally, using a selector 450 generally similar to the selector 150 of FIG. 3.
  • the device 410 has a leak return orifice OF into which a leak return pipe having several sections, 438A and 438B.
  • the part 410A of the casing has the shape of a disc drilled in its center by a bore 410'A.
  • An axial extension 415 of the cylinder block extends in this bore, from which it is sealed with one or more several 415 'seals.
  • This extension of the cylinder block has a central cavity 490, provided with groove 492 which forms thus a motor output allowing the rotation of the cylinder block with an external element to train, such as a small tree engine.
  • the flow divider according to the invention is not specifically made to deliver a torque and that's why the device of Figures 1 to 5 is devoid of motor output.
  • the cylinder block is pierced by a hole 438C allowing to bring between the external transverse face 414B of the cylinder block and part 410A of the crankcase the fluid from leaks in the bore 422B of the distributor in which the selector 450 is disposed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Hydraulic Motors (AREA)
EP20030290899 2002-04-19 2003-04-10 Vorrichtung zur Teilung oder zum Zusammenfügen einer Strömung Expired - Fee Related EP1355068B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0204958 2002-04-19
FR0204958A FR2838791B1 (fr) 2002-04-19 2002-04-19 Dispositif pour diviser ou reunir un debit de fluide

Publications (2)

Publication Number Publication Date
EP1355068A1 true EP1355068A1 (de) 2003-10-22
EP1355068B1 EP1355068B1 (de) 2009-12-23

Family

ID=28459935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030290899 Expired - Fee Related EP1355068B1 (de) 2002-04-19 2003-04-10 Vorrichtung zur Teilung oder zum Zusammenfügen einer Strömung

Country Status (3)

Country Link
EP (1) EP1355068B1 (de)
DE (1) DE60330619D1 (de)
FR (1) FR2838791B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008068206A1 (de) * 2006-12-07 2008-06-12 Zf Friedrichshafen Ag Hydraulischer radialkolbenmotor
WO2014048842A1 (fr) * 2012-09-28 2014-04-03 Poclain Hydraulics Industrie Appareil hydraulique présentant une structure améliorée pour sa mise en cylindrée

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2248009A1 (de) * 1972-09-29 1974-04-04 Bosch Gmbh Robert Radialkolbenmaschine
FR2199836A5 (de) 1972-09-20 1974-04-12 Peltier Raymond
JPS50128030A (de) * 1974-03-28 1975-10-08
FR2292854A1 (fr) * 1974-11-29 1976-06-25 Rexroth Sigma Perfectionnements apportes aux machines a fluide a pistons radiaux
FR2476770A1 (fr) 1980-02-27 1981-08-28 Poclain Hydraulics Sa Diviseur de debit
US4475870A (en) * 1980-08-19 1984-10-09 Karl Eickmann Hydraulic arrangement
US5285641A (en) * 1990-11-10 1994-02-15 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Flow dividing pump
FR2701736A1 (fr) * 1993-02-19 1994-08-26 Poclain Hydraulics Sa Mécanisme à fluide sous pression comportant des plots tubulaires, tel qu'un moteur ou une pompe hydraulique.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2199836A5 (de) 1972-09-20 1974-04-12 Peltier Raymond
DE2248009A1 (de) * 1972-09-29 1974-04-04 Bosch Gmbh Robert Radialkolbenmaschine
JPS50128030A (de) * 1974-03-28 1975-10-08
FR2292854A1 (fr) * 1974-11-29 1976-06-25 Rexroth Sigma Perfectionnements apportes aux machines a fluide a pistons radiaux
FR2476770A1 (fr) 1980-02-27 1981-08-28 Poclain Hydraulics Sa Diviseur de debit
US4475870A (en) * 1980-08-19 1984-10-09 Karl Eickmann Hydraulic arrangement
US5285641A (en) * 1990-11-10 1994-02-15 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Flow dividing pump
FR2701736A1 (fr) * 1993-02-19 1994-08-26 Poclain Hydraulics Sa Mécanisme à fluide sous pression comportant des plots tubulaires, tel qu'un moteur ou une pompe hydraulique.

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008068206A1 (de) * 2006-12-07 2008-06-12 Zf Friedrichshafen Ag Hydraulischer radialkolbenmotor
US8225707B2 (en) 2006-12-07 2012-07-24 Zf Friedrichshafen Ag Hydraulic radial piston engine
WO2014048842A1 (fr) * 2012-09-28 2014-04-03 Poclain Hydraulics Industrie Appareil hydraulique présentant une structure améliorée pour sa mise en cylindrée
FR2996267A1 (fr) * 2012-09-28 2014-04-04 Poclain Hydraulics Ind Appareil hydraulique presentant une structure amelioree pour sa mise en cylindree
FR2996268A1 (fr) * 2012-09-28 2014-04-04 Poclain Hydraulics Ind Appareil hydraulique presentant une structure amelioree pour sa mise en cylindree.
CN104797817A (zh) * 2012-09-28 2015-07-22 波克兰液压工业设备公司 具有用于其汽缸执行的改进结构的液压设备
US9518466B2 (en) 2012-09-28 2016-12-13 Poclain Hydraulics Industrie Hydraulic apparatus having an improved structure for its commissioning
RU2619436C2 (ru) * 2012-09-28 2017-05-15 Поклэн Гидроликс Индастри Гидравлическое устройство, обладающее улучшенной конструкцией в отношении его перевода в рабочий режим
CN104797817B (zh) * 2012-09-28 2017-12-01 波克兰液压工业设备公司 具有用于试运行的改进结构的液压设备

Also Published As

Publication number Publication date
DE60330619D1 (de) 2010-02-04
FR2838791B1 (fr) 2005-11-25
FR2838791A1 (fr) 2003-10-24
EP1355068B1 (de) 2009-12-23

Similar Documents

Publication Publication Date Title
EP0223656B1 (de) Mechanismus, Motor oder Pumpe mit mindestens zwei verschiedenen aktiven Hubvolumen
CA1325578C (fr) Groupe motopropulseur a accumulateur elastique d'elasticite variable et vehicule comportant un tel groupe
EP0284460B1 (de) Druckflüssigkeitsmechanismus, Pumpe oder Motor mit mehreren Verdrängungsvolumen
EP2617985B1 (de) Hydraulische Getriebevorrichtung mit mehreren Zylindern
EP0969205B1 (de) Hydromotor in Kompaktbauweise
EP0601916B1 (de) Hydraulikmotoraggegrat zum Antrieb eines Bohrwerkzeuges
EP0921309B1 (de) Hydraulikmotor mit Schaltventil
FR2522739A1 (fr) Transducteur de puissance hydraulique
FR2536475A1 (fr) Dispositif hydrostatique de commande, notamment de direction
FR2462582A1 (fr) Moteur hydraulique
EP1355068A1 (de) Vorrichtung zur Teilung oder zum Zusammenfügen einer Strömung
EP3685075B1 (de) Versorgungseinheit für mindestens eine hydraulische maschine
EP1573198B1 (de) Hydraulikpumpe oder -motor
EP0526333B1 (de) Druckflüssigkeitsvorrichtung mit Ausgleichsräumen
EP0365420B1 (de) Druckflüssigkeitsmechanismus mit zwei Hubvolumen und seine Anwendung in einem geschlossenen Kreis
FR2554768A1 (fr) Dispositif de transmission de puissance destine a un vehicule
FR2794496A1 (fr) Selecteur de cylindree pour un moteur hydraulique evitant un freinage brutal lors du passage de petite cylindree en grande cylindree
EP0263218B1 (de) Flüssigkeitsmechanismus mit Fluidverteilscheibe und Gegenscheibe
FR2661456A1 (fr) Mecanisme a fluide sous pression, tel qu'un moteur ou une pompe hydraulique, a plusieurs cylindrees de fonctionnement.
FR2519402A1 (fr) Distributeur rotatif pour servomecanisme hydraulique
FR2889262A1 (fr) Mecanisme hydrostatique reglable a pistons axiaux de refoulement effectuant des mouvements de refoulement dephases.
FR2736124A1 (fr) Ensemble hydrostatique a patinage controle
CA1189388A (fr) Dispositif hydraulique rotatif convertisseur et repartiteur a multi-cylindrees synchronisees
WO2023213933A1 (fr) Machine hydraulique munie d'un tiroir de changement de sens
WO2023242503A1 (fr) Pompe hydraulique amelioree pour entrainement a haute vitesse

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

17P Request for examination filed

Effective date: 20040318

AKX Designation fees paid

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 20080130

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 60330619

Country of ref document: DE

Date of ref document: 20100204

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20100924

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20140422

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20140411

Year of fee payment: 12

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60330619

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20150410

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150410

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151103

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20190423

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200430