EP1052414A1 - Fluid valve especially for hydraulic servocontrol - Google Patents
Fluid valve especially for hydraulic servocontrol Download PDFInfo
- Publication number
- EP1052414A1 EP1052414A1 EP00401265A EP00401265A EP1052414A1 EP 1052414 A1 EP1052414 A1 EP 1052414A1 EP 00401265 A EP00401265 A EP 00401265A EP 00401265 A EP00401265 A EP 00401265A EP 1052414 A1 EP1052414 A1 EP 1052414A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plunger
- fluid
- smaller radius
- bore
- active part
- 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
Links
Images
Classifications
-
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/0422—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with manually-operated pilot valves, e.g. joysticks
Definitions
- the present invention relates to improvements brought to the fluid dispensing devices, especially for hydraulic remote control, such as those called “hydraulic manipulators”, including minus a pressure reducer mounted in a body and a control unit capable of modifying the calibration of the reducer, which reducer comprises a plunger movable, by the aforesaid control member, in a body cavity which includes, on one side, a connected housing to a hydraulic fluid return pipe T and containing a reduction spring for the reduction gear and a spring plunger, and on the other side, a bore communicating, axially opposite the above-mentioned housing, with a remote control fluid flow chamber and, laterally, with a chamber supplied with fluid under pressure P from a source of fluid under pressure, said bore housing an active part of the plunger traversed by a channel having an axial orifice leading to the departure chamber and a lateral orifice suitable for being selectively connected to the housing or the supply chamber to ensure the fluid pressure reduction function of remote control when moving the diver in the bore.
- Such a device is described for example in the documents FR 2 376 978 or FR 2 507 732.
- a known device partially shown in section in fig. 1 of the accompanying drawings, comprises a body (can be made up of several parts to facilitate the installation of components internal) in which at least one reduction gear is fitted fluid pressure 2.
- This reducer includes a plunger 3 able to move in a cavity 4 formed in the body 1.
- This cavity 4 has, on one side, an enlarged housing 5 connected to a return channel to the tank (T) and in which is disposed a calibration spring 6 taking support between a shoulder 7 of the plunger and a cup 8 movable in the housing 5 near the end free of the plunger and, on the other side, a bore 9 in which an active part 10 of the plunger can be moved to perform the pressure reduction function (P) fluid that is brought in from a source through an orifice inlet (not visible) connected to bore 9 by a chamber 12 opening radially therein, while that bore 9 opens out lower into a chamber 13 for the remote control fluid (D).
- the part active or plunger 10 of the plunger has a channel axial interior 22 opening at the base of the piston 10 into the starting room 13 and ending superiorly with a radial bore 23 opening laterally.
- the plunger 3 further includes a rod portion 14, overcoming the active part 10 and extending substantially in the cavity 5 while being surrounded coaxially by the calibration spring 6; this part of rod 14 passes through the cup 8 and ends with a head enlarged 15 defining a shoulder 16 for retaining the cup.
- a return spring 17, coaxial with the rod 14, is interposed between the cup 8 and a shoulder defined in the body 1, to push the cup upwards, that is to say towards its position defining a calibration minimum.
- the cup 8 is surmounted by a pusher 18 movable at free sliding in a body bore and making partially protruding from the body to be in contact a cam 19 able to pivot around an axis under the action an actuating member such as a handle 21.
- Such a remote control device gives entirely satisfaction in terms of its technical functioning, and it is widely used.
- a fluid dispensing device especially for hydraulic remote control is characterized, being arranged in accordance with the invention, in that the active part of the plunger has at least a portion of its periphery having a smaller radius over at least one angular sector and having sufficient axial length so that when the diver is moved from its rest position, a passage is established, between the above rooms receiving the supply fluid (P) and the starting fluid (D), through the interval defined by said portion of radius less and the bore as soon as the radial orifice of the channel inside the plunger is closed by the wall of the bore.
- the portion of smaller radius of the active part of the plunger is annular and coaxial with the active part of the plunger.
- the portion of smaller radius of the active part of the plunger is unique.
- multiple spoke portions less are provided on the active part of the plunger; in particular these portions of smaller radius are arranged symmetrically, especially two in number diametrically opposite or preferably the number of four, two to two diametrically opposite.
- each portion of smaller radius is a dish.
- this arrangement selectively provides two separate circuits for fluid flow, of a hand, on the periphery of the diver with a section of increased passage for the flow of fluid from the chamber supply to the departure chamber (regulation) and, on the other hand, axially through the central channel of the plunger for the reverse flow of the fluid from the departure chamber to the reservoir.
- the increase in the cross section as well supplied to the fluid during the operating phase in regulation results in a significant gain in the time of response of the device, which may be accompanied by a significant reduction or even cancellation of noise fluid flow.
- FIG. 2 there is depicted a portion of fluid dispensing device having a similar overall concept (although not identical in its details) to that of the prior device illustrated in FIG. 1.
- the part active 10 of the diver 3 has at least a portion 24 of its periphery with a smaller radius over at least one angular sector and having sufficient axial length so that when the diver is moved from its rest position, a passage is established between the above chambers 12 receiving the fluid supply P and 13 receiving the starting fluid D, through the interval defined by said portion 24 of smaller radius and the bore 9 as soon as the radial orifice 23 of the channel 22 inside the plunger is closed by the wall of bore 9.
- the smallest radius portion of the part active of the diver is axially framed by two zones having the nominal diameter of the active part, namely the terminal zone 10a of the plunger and zone 10b containing the radial hole (s) 23 of the inner channel 22.
- the device In FIG. 2, the device is in the neutral position or rest, the cam 19 being arranged coaxially in the axis 25 of the device.
- the pusher 18 is returned to the projecting position (high position) by the return spring 17 and, the pusher 18 coagulating with the head 15 of the plunger 3, keeps this plunger in neutral position shown in Figure 2 in which the orifice lateral 23 of the inner channel 22 opens, completely or partially, in housing 5.
- the terminal portion 10a of the plunger is released from bore 9: the portion 24 of smaller radius of the active part 10 of the plunger and the bore 9 define between them a passage 26 which establishes a connection between the chamber 12 and the chamber 13.
- the pressurized fluid P can thus begin to flow towards the start D (room 13).
- the radial hole 23 When the plunger continues to be moved, the radial hole 23 first partially opens, then fully at the end of the stroke of the plunger, in chamber 12 (fig. 4). The fluid under pressure P then flows towards the start D, on the one hand, by passage 26 which remains open and, on the other hand, through channel 22.
- One solution may consist in producing said portion 24 in annular form so that the active part of the plunger is, in this zone, in the form of a revolution with a smaller radius than the two framing zones 10 a and 10 b (fig. 5) .
- This solution which is advantageous with regard to the sufficiency of the section of the annular passage 26 thus defined, nevertheless leads to insufficient guidance of the plunger 3 in the bore 9 (only the part of the bore comprised between the chamber 12 and the housing 5 ensures guiding the plunger when the end portion 10a is out of the bore).
- the radius reduction can be carried out in the form of a surface with different radius of curvature and / or center of curvature as shown in Figure 6, which leads to a passage 26 in lunula shape.
- the arrangement according to the invention leads to the result advantageous to establish two separate circulation circuits of the fluid, namely a circuit ensuring the connection between the chambers 12 (pressure supply P) and 13 (flow D) through the passage 26 and channel 22, and a circuit ensuring the connection between chamber 13 (outlet D) and housing 5 (return to tank T). It follows that, thanks to the implementation of the provisions of the invention, the passage section offered to the fluid is significantly increased compared to previous devices in which only the internal channel provided the fluid connection.
- the machining of the body 1 can be simplified notably, and therefore its cost price to be lowered, because, to form the chamber 12 for admitting the supply fluid under pressure P, it is no longer necessary to machine the interior of the corresponding groove, but a simple counterboring can be carried out flat concentrically with the departure chamber 13.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Multiple-Way Valves (AREA)
- Nozzles (AREA)
- Details Of Reciprocating Pumps (AREA)
- Fluid-Driven Valves (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Fluid Pressure (AREA)
- Actuator (AREA)
Abstract
Description
La présente invention concerne des perfectionnements apportés aux dispositifs distributeurs de fluide, notamment pour télécommande hydraulique, tels que ceux dénommés « manipulateurs hydrauliques », comprenant au moins un réducteur de pression monté dans un corps et un organe de commande propre à modifier le tarage du réducteur, lequel réducteur comporte un plongeur déplaçable, par le susdit organe de commande, dans -une cavité du corps qui comprend, d'un côté, un logement relié à un conduit de retour du fluide hydraulique T et renfermant un ressort de tarage du réducteur et un ressort de rappel du plongeur, et, de l'autre côté, un alésage communiquant, axialement à l'opposé du susdit logement, avec une chambre de départ du fluide de télécommande et, latéralement, avec une chambre alimentée en fluide sous pression P en provenance d'une source de fluide sous pression, ledit alésage abritant une partie active du plongeur traversée par un canal ayant un orifice axial débouchant vers la chambre de départ et un orifice latéral propre à être mis en communication sélectivement avec le logement ou la chambre d'alimentation pour assurer la fonction de réduction de pression de fluide de télécommande lors du déplacement du plongeur dans l'alésage.The present invention relates to improvements brought to the fluid dispensing devices, especially for hydraulic remote control, such as those called "hydraulic manipulators", including minus a pressure reducer mounted in a body and a control unit capable of modifying the calibration of the reducer, which reducer comprises a plunger movable, by the aforesaid control member, in a body cavity which includes, on one side, a connected housing to a hydraulic fluid return pipe T and containing a reduction spring for the reduction gear and a spring plunger, and on the other side, a bore communicating, axially opposite the above-mentioned housing, with a remote control fluid flow chamber and, laterally, with a chamber supplied with fluid under pressure P from a source of fluid under pressure, said bore housing an active part of the plunger traversed by a channel having an axial orifice leading to the departure chamber and a lateral orifice suitable for being selectively connected to the housing or the supply chamber to ensure the fluid pressure reduction function of remote control when moving the diver in the bore.
Un tel dispositif est décrit par exemple dans les
documents FR 2 376 978 ou FR 2 507 732.Such a device is described for example in the
Un dispositif connu, représenté partiellement en
coupe à la fig. 1 des dessins annexés, comporte un corps
(pouvant être constitué par la réunion de plusieurs
parties pour faciliter la mise en place des composants
internes) dans lequel est aménagé au moins un réducteur de
pression de fluide 2. Ce réducteur comprend un plongeur 3
apte à se déplacer dans une cavité 4 ménagée dans le corps
1. Cette cavité 4 comporte, d'un côté, un logement élargi
5 raccordé à un canal de retour vers le réservoir (T) et
dans lequel est disposé un ressort de tarage 6 prenant
appui entre un épaulement 7 du plongeur et une coupelle 8
mobile dans le logement 5 au voisinage de l'extrémité
libre du plongeur et, de l'autre côté, un alésage 9 dans
lequel une partie active 10 du plongeur peut être déplacée
pour assurer la fonction de réduction de la pression (P)
du fluide qui est amené depuis une source par un orifice
d'entrée (non visible) raccordé à l'alésage 9 par une
chambre 12 débouchant radialement dans celui-ci, tandis
que l'alésage 9 débouche inférieurement dans une chambre
13 de départ du fluide de télécommande (D). La partie
active ou piston 10 du plongeur comporte un canal
intérieur axial 22 débouchant à la base du piston 10 dans
la chambre de départ 13 et se terminant supérieurement par
un perçage radial 23 débouchant latéralement.A known device, partially shown in
section in fig. 1 of the accompanying drawings, comprises a body
(can be made up of several
parts to facilitate the installation of components
internal) in which at least one reduction gear is fitted
Le plongeur 3 comporte en outre une partie de tige
14, surmontant la partie active 10 et s'étendant
sensiblement dans la cavité 5 en étant entourée
coaxialement par le ressort de tarage 6 ; cette partie de
tige 14 traverse la coupelle 8 et se termine par une tête
élargie 15 définissant un épaulement 16 de retenue de la
coupelle.The
Un ressort de rappel 17, coaxial à la tige 14, est
interposé entre la coupelle 8 et un épaulement défini dans
le corps 1, pour repousser la coupelle vers le haut,
c'est-à-dire vers sa position définissant un tarage
minimum.A
La coupelle 8 est surmontée d'un poussoir 18 mobile à
libre coulissement dans un alésage du corps et faisant
saillie partiellement hors du corps pour être au contact
d'une came 19 apte à pivoter autour d'un axe sous l'action
d'un organe d'actionnement tel qu'une poignée 21.The
Le fonctionnement de ce dispositif est connu et l'on
pourra se reporter par exemple aux documents précités FR
2376 978 ou FR 2 507 732 pour connaítre des précisions
supplémentaires.The operation of this device is known and we
could refer for example to the aforementioned documents FR
2376 978 or
Un tel dispositif de télécommande donne entièrement satisfaction sur le plan de son fonctionnement technique, et il est largement utilisé.Such a remote control device gives entirely satisfaction in terms of its technical functioning, and it is widely used.
Toutefois, pour mieux répondre à diverses exigences de la pratique, il est apparu souhaitable d'apporter à ce dispositif connu des perfectionnements propres à améliorer la rapidité de réponse en fonctionnement en régulation et à faciliter l'usinage du corps ou des pièces constitutives du corps afin de recueillir une réduction des coûts de fabrication.However, to better meet various requirements of practice, it appeared desirable to bring to this device known for improvements capable of improving the speed of response in regulation operation and to facilitate the machining of the body or of the constituent parts of the body in order to collect a reduced cost of manufacturing.
A cette fin, un dispositif distributeur de fluide notamment pour télécommande hydraulique, tel que mentionné au préambule, se caractérise, étant agencé conformément à l'invention, en ce que la partie active du plongeur comporte au moins une portion de sa périphérie ayant un rayon moindre sur au moins un secteur angulaire et ayant une longueur axiale suffisante pour que, lorsque le plongeur est déplacé à partir de sa position de repos, un passage soit établi, entre les susdites chambres recevant le fluide d'alimentation (P) et le fluide de départ (D), à travers l'intervalle défini par ladite portion de rayon moindre et l'alésage dès que l'orifice radial du canal intérieur au plongeur est obturé par la paroi de l'alésage.To this end, a fluid dispensing device especially for hydraulic remote control, as mentioned in the preamble, is characterized, being arranged in accordance with the invention, in that the active part of the plunger has at least a portion of its periphery having a smaller radius over at least one angular sector and having sufficient axial length so that when the diver is moved from its rest position, a passage is established, between the above rooms receiving the supply fluid (P) and the starting fluid (D), through the interval defined by said portion of radius less and the bore as soon as the radial orifice of the channel inside the plunger is closed by the wall of the bore.
Dans un mode de réalisation possible, la portion de rayon moindre de la partie active du plongeur est annulaire et coaxiale à la partie active du plongeur.In one possible embodiment, the portion of smaller radius of the active part of the plunger is annular and coaxial with the active part of the plunger.
Dans un autre mode de réalisation possible, la portion de rayon moindre de la partie active du plongeur est unique.In another possible embodiment, the portion of smaller radius of the active part of the plunger is unique.
Toutefois, pour assurer l'obtention d'une section globale suffisante pour l'écoulement du fluide, dans un mode de réalisation préféré, plusieurs portions de rayon moindre sont prévues sur la partie active du plongeur ; notamment ces portions de rayon moindre sont agencés symétriquement, en particulier au nombre de deux diamétralement opposées ou de préférence au nombre de quatre, deux à deux diamétralement opposées.However, to ensure obtaining a section sufficient overall for fluid flow, in a preferred embodiment, multiple spoke portions less are provided on the active part of the plunger; in particular these portions of smaller radius are arranged symmetrically, especially two in number diametrically opposite or preferably the number of four, two to two diametrically opposite.
Dans un exemple de réalisation préféré en raison de la simplicité des usinages nécessaires, chaque portion de rayon moindre est un plat.In a preferred embodiment due to the simplicity of the machining required, each portion of smaller radius is a dish.
Grâce aux dispositions propres à l'invention, le mode de fonctionnement du dispositif est le suivant :
- en fonction neutre (poussoir non enfoncé et plongeur rappelé vers le haut par le ressort de rappel), l'orifice supérieur radial du canal du plongeur débouche dans le logement précité et ledit canal établit une communication entre la chambre de départ et le logement : le fluide s'écoule alors de la chambre de départ (D) vers le réservoir (T) ;
- le poussoir étant un peu enfoncé, le plongeur est descendu dans l'alésage ; l'orifice radial du canal est obturé par la paroi de l'alésage, interrompant ainsi toute possibilité d'écoulement de fluide par ce canal ; puis la portion de diamètre moindre de la partie active du plongeur chevauche la paroi de l'alésage comprise entre les chambres de départ et d'alimentation : le fluide hydraulique s'écoule alors, entre le plongeur et la paroi de l'alésage, depuis la chambre d'alimentation vers la chambre de départ ;
- enfin, le plongeur étant déplacé à fond de course, l'orifice radial du canal du plongeur débouche dans la chambre d'alimentation et le fluide s'écoule depuis la chambre d'alimentation jusqu'à la chambre de départ en passant, à la fois, par le canal et par l'intervalle entre le plongeur et la paroi de l'alésage.
- in neutral function (pushbutton not pressed and plunger returned upwards by the return spring), the upper radial orifice of the plunger channel opens into the abovementioned housing and said channel establishes communication between the starting chamber and the housing: the fluid then flows from the starting chamber (D) to the reservoir (T);
- the pusher being slightly depressed, the plunger is lowered into the bore; the radial orifice of the channel is closed off by the wall of the bore, thereby interrupting any possibility of fluid flow through this channel; then the portion of smaller diameter of the active part of the plunger overlaps the wall of the bore comprised between the starting and supply chambers: the hydraulic fluid then flows, between the plunger and the wall of the bore, from the supply chamber to the departure chamber;
- finally, the plunger being moved to the bottom of the travel, the radial orifice of the plunger channel opens into the supply chamber and the fluid flows from the supply chamber to the departure chamber passing through the times, by the channel and by the interval between the plunger and the wall of the bore.
Ainsi, cet agencement procure sélectivement deux circuits distincts pour l'écoulement du fluide, d'une part, à la périphérie du plongeur avec une section de passage accru pour l'écoulement du fluide de la chambre d'alimentation vers la chambre de départ (régulation) et, d'autre part, axialement par le canal central du plongeur pour l'écoulement du fluide en sens inverse depuis la chambre de départ vers le réservoir.Thus, this arrangement selectively provides two separate circuits for fluid flow, of a hand, on the periphery of the diver with a section of increased passage for the flow of fluid from the chamber supply to the departure chamber (regulation) and, on the other hand, axially through the central channel of the plunger for the reverse flow of the fluid from the departure chamber to the reservoir.
L'accroissement de la section de passage ainsi procurée au fluide au cours de la phase de fonction en régulation entraíne un gain sensible sur le temps de réponse du dispositif, pouvant s'accompagner d'une réduction notable, voire d'une annulation du bruit d'écoulement du fluide. The increase in the cross section as well supplied to the fluid during the operating phase in regulation results in a significant gain in the time of response of the device, which may be accompanied by a significant reduction or even cancellation of noise fluid flow.
Enfin, il peut en résulter une simplification significative de la fabrication du corps : on peut prévoir, pour former la chambre d'alimentation, un simple lamage à fond plat concentrique à l'orifice de la chambre de départ, en remplacement de l'usinage jusqu'ici nécessaire.Finally, it may result in a simplification significant of the manufacturing of the body: we can provide, to form the supply chamber, a simple counterbore concentric with the orifice of the chamber starting, replacing the machining so far necessary.
L'invention sera mieux comprise à la lecture de la description détaillée qui suit de certains modes de réalisation préférés donnés uniquement à titre d'exemples non limitatifs. Dans cette description, on se réfère -aux dessins annexés sur lesquels :
- les figures 2 à 4 sont des vues partielles de côté, en coupe, analogues à celles de la figure 1 et illustrant les dispositions conformes à l'invention respectivement dans trois positions fonctionnelles différentes ;
- et les figures 5 à 10 sont des vues en coupe transversale illustrant respectivement diverses configurations possibles du plongeur dans le cadre de l'invention.
- Figures 2 to 4 are partial side views, in section, similar to those of Figure 1 and illustrating the arrangements according to the invention respectively in three different functional positions;
- and Figures 5 to 10 are cross-sectional views respectively illustrating various possible configurations of the plunger within the scope of the invention.
En se reportant maintenant à la figure 2, il y est représenté une partie de dispositif distributeur de fluide ayant une conception d'ensemble analogue (bien que non identique dans ses détails) à celle du dispositif antérieur illustré à la figure 1.Referring now to Figure 2, there is depicted a portion of fluid dispensing device having a similar overall concept (although not identical in its details) to that of the prior device illustrated in FIG. 1.
Dans le dispositif de la figure 2 (dans laquelle on reprend
les mêmes références numériques pour désigner les organes ou
parties d'organes analogues à ceux de la figure 1), la partie
active 10 du plongeur 3 comporte au moins une portion 24 de sa
périphérie ayant un rayon moindre sur au moins un secteur angulaire
et ayant une longueur axiale suffisante pour que, lorsque le
plongeur est déplacé à partir de sa position de repos, un passage
soit établi entre les susdites chambres 12 recevant le fluide
d'alimentation P et 13 recevant le fluide de départ D, à travers
l'intervalle défini par ladite portion 24 de rayon moindre et
l'alésage 9 dès que l'orifice radial 23 du canal 22 intérieur au
plongeur est obturé par la paroi de l'alésage 9.In the device of Figure 2 (in which we resume
the same reference numerals to designate the organs or
parts of organs similar to those of FIG. 1), the part
active 10 of the
Autrement dit, la portion de moindre rayon de la partie
active du plongeur est encadrée axialement par deux zones ayant le
diamètre nominal de la partie active, à savoir la zone terminale
10a du plongeur et la zone 10b contenant le ou les orifices radiaux
23 du canal intérieur 22.In other words, the smallest radius portion of the part
active of the diver is axially framed by two zones having the
nominal diameter of the active part, namely the
Le fonctionnement du dispositif agencé comme précité est illustré aux figures 2 à 4.The operation of the device arranged as above is illustrated in figures 2 to 4.
A la figure 2, le dispositif est en position neutre ou de
repos, la came 19 étant disposée coaxialement dans l'axe 25 du
dispositif. Le poussoir 18 est rappelé en position saillante
(position haute) par le ressort de rappel 17 et, le poussoir 18
coagissant avec la tête 15 du plongeur 3, maintient ce plongeur en
position neutre montrée à la figure 2 dans laquelle l'orifice
latéral 23 du canal intérieur 22 s'ouvre, totalement ou
partiellement, dans le logement 5.In FIG. 2, the device is in the neutral position or
rest, the
Dans cette position, le fluide D venant de l'organe commandé
(par exemple un distributeur hydraulique) - chambre 13 - passe par
le canal 22 et, à travers l'orifice latéral 23, dans le logement 5,
pour s'écouler finalement vers le réservoir (retour T).In this position, the fluid D coming from the controlled member
(for example a hydraulic distributor) - chamber 13 - goes through
the
Dans le même temps, la partie terminale 10a du plongeur est
engagée dans l'alésage 9 et isole l'une de l'autre les chambres 12
et 13.At the same time, the
Lorsqu'on commence à incliner la came 13 et donc à enfoncer
le poussoir 18 (fig. 3), le plongeur 3 coulisse dans l'alésage 9 de
telle sorte que l'orifice radial 23 du canal intérieur 22 est
obturé par l'alésage 9. When we start to tilt the
Immédiatement après, la partie terminale 10a du plongeur
s'est dégagée de l'alésage 9 : la portion 24 de moindre rayon de la
partie active 10 du plongeur et l'alésage 9 définissent entre eux
un passage 26 qui établit une liaison entre la chambre 12 et la
chambre 13. Le fluide sous pression P peut ainsi commencer à
s'écouler en direction du départ D (chambre 13).Immediately after, the
Lorsque le plongeur continue à être déplacé, l'orifice radial
23 s'ouvre d'abord partiellement, puis entièrement en fin de course
du plongeur, dans la chambre 12 (fig. 4). Le fluide sous pression P
s'écoule alors vers le départ D, d'une part, par le passage 26
précité qui reste ouvert et, d'autre part, par le canal 22.When the plunger continues to be moved, the
Différents modes de réalisation peuvent être envisagés pour
constituer la portion 24 de rayon moindre de la partie active du
plongeur 10.Different embodiments can be envisaged for
constitute the
Une solution peut consister à réaliser ladite portion 24 sous
forme annulaire de sorte que la partie active du plongeur se
présente, dans cette zone, sous forme de révolution avec un rayon
moindre que les deux zones encadrantes 10a et 10b(fig. 5). Cette
solution, intéressante quant à la suffisance de la section du
passage annulaire 26 ainsi défini, conduit toutefois à un guidage
insuffisant du plongeur 3 dans l'alésage 9 (seule la partie de
l'alésage comprise entre la chambre 12 et le logement 5 assure le
guidage du plongeur lorsque la partie terminale 10a est sortie de
l'alésage).One solution may consist in producing
En pratique, on donnera donc plutôt la préférence à un agencement conduisant au maintien du guidage du plongeur dans la région de celui-ci ayant un moindre rayon ; autrement dit, on donne au plongeur un rayon moindre seulement dans un certain secteur angulaire de celui-ci ou dans certains secteurs angulaires de celui-ci répartis périphériquement. In practice, therefore, preference will rather be given to a arrangement leading to maintaining the guidance of the plunger in the region thereof having a smaller radius; in other words, we give to the diver a smaller radius only in a certain area angular of it or in certain angular sectors of the latter distributed peripherally.
L'amoindrissement de rayon peut être réalisé sous forme d'une
surface à rayon de courbure et/ou à centre de courbure différent
comme représenté à la figure 6, ce qui conduit à un passage 26 en
forme de lunule.The radius reduction can be carried out in the form of a
surface with different radius of curvature and / or center of curvature
as shown in Figure 6, which leads to a
En pratique, il est plus simple et donc moins coûteux de
réaliser cette portion 24 sous forme d'un plat comme illustré à la
figure 7.In practice, it is simpler and therefore less expensive to
make this
Pour obtenir une section de passage suffisante pour le fluide tout en conservant des conditions de guidage satisfaisantes du plongeur, on peut réaliser plusieurs régions de moindre rayon réparties , de préférence de façon sensiblement équidistantes, sur le pourtour de la partie active du plongeur. Ainsi on peut réaliser deux plats diamétralement opposés (fig. 8) ou trois plats décalés angulairenent de 120° (fig. 9). De préférence, on a recours à un agencement à quatre plats (fig. 10) qui combine les avantages d'une grande section globale offerte à l'écoulement de fluide et de surfaces de guidage en nombre suffisant et réparties symétriquement.To obtain a sufficient cross-section for the fluid while maintaining satisfactory guidance conditions of the diver, we can make several regions of smaller radius distributed, preferably substantially equidistantly, over around the active part of the diver. So we can realize two diametrically opposed plates (fig. 8) or three offset plates 120 ° angular (fig. 9). Preferably, a four-course arrangement (Fig. 10) which combines the advantages of a large overall cross-section offered to the flow of fluid and sufficient and distributed guide surfaces symmetrically.
L'agencement conforme à l'invention conduit au résultat
avantageux d'établir deux circuits distincts de circulation du
fluide, à savoir un circuit assurant la liaison entre les chambres
12 (alimentation à pression P) et 13 (départ D) à travers le
passage 26 et le canal 22, et un circuit assurant la liaison entre
la chambre 13 (départ D) et le logement 5 (retour au réservoir T).
Il en résulte que, grâce à la mise en oeuvre des dispositions de
l'invention, la section de passage offerte au fluide est
sensiblement accrue par rapport aux dispositifs antérieurs dans
lesquels seul le canal intérieur assurait la liaison fluidique.The arrangement according to the invention leads to the result
advantageous to establish two separate circulation circuits of the
fluid, namely a circuit ensuring the connection between the chambers
12 (pressure supply P) and 13 (flow D) through the
En outre, l'usinage du corps 1 peut être simplifié
notablement, et donc son prix de revient être abaissé, du fait que,
pour former la chambre 12 d'admission du fluide d'alimentation sous
la pression P, il n'est plus nécessaire d'usiner l'intérieur de la
gorge correspondante, mais on peut réaliser un simple lamage à fond
plat concentriquement à la chambre de départ 13.In addition, the machining of the
Claims (8)
caractérisé en ce que la partie active (10) du plongeur (3) comporte au moins une portion de sa périphérie ayant un rayon moindre sur au moins un secteur angulaire et ayant une longueur axiale suffisante pour que, lorsque le plongeur est déplacé à partir de sa position de repos, un passage soit établi, entre les susdites chambres (12) recevant le fluide d'alimentation (P) et (13) recevant le fluide de départ (D), à travers l'intervalle (26) défini par ladite portion (24) de rayon moindre et l'alésage (9) après que l'orifice radial (23) du canal (22) intérieur au plongeur ait été obturé par la paroi de l'alésage (9).Fluid distributor device, in particular for hydraulic remote control, comprising at least one pressure reducer (2) mounted in a body (1) and a control member (19) suitable for modifying the setting of the reducer, which reducer (2) comprises a plunger (3) movable, by the aforesaid control member (19), in a cavity (4) of the body (1) which comprises, on one side, a housing (5) connected to a return pipe for the hydraulic fluid ( T) and containing a reduction spring of the reduction gear and a return spring of the plunger, and, on the other side, a bore (9) communicating, axially opposite the above-mentioned housing (5), with a chamber (13 ) starting the remote control fluid and, laterally, with a chamber (12) supplied with pressurized fluid (P) coming from a source of pressurized fluid, said bore (9) housing an active part (10) of the plunger (3) traversed by a channel (22) having an axial orifice opening towards the departure chamber ( 13) and a lateral orifice (23) suitable for being placed in selective communication with the housing (5) or the supply chamber (12) to perform the function of reducing the pressure of the remote control fluid during the displacement of the plunger in the '' bore (9),
characterized in that the active part (10) of the plunger (3) comprises at least a portion of its periphery having a smaller radius over at least one angular sector and having a sufficient axial length so that, when the plunger is moved from in its rest position, a passage is established between the aforesaid chambers (12) receiving the supply fluid (P) and (13) receiving the starting fluid (D), through the interval (26) defined by said portion (24) of smaller radius and the bore (9) after the radial orifice (23) of the channel (22) inside the plunger has been closed by the wall of the bore (9).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9906088A FR2793532B1 (en) | 1999-05-12 | 1999-05-12 | FLUID DISTRIBUTOR DEVICE, PARTICULARLY FOR HYDRAULIC REMOTE CONTROL |
| FR9906088 | 1999-05-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1052414A1 true EP1052414A1 (en) | 2000-11-15 |
| EP1052414B1 EP1052414B1 (en) | 2004-04-07 |
Family
ID=9545540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00401265A Expired - Lifetime EP1052414B1 (en) | 1999-05-12 | 2000-05-09 | Fluid valve especially for hydraulic servocontrol |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1052414B1 (en) |
| JP (1) | JP2000357016A (en) |
| AT (1) | ATE263929T1 (en) |
| DE (1) | DE60009598T2 (en) |
| FR (1) | FR2793532B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2066941A1 (en) * | 2006-09-26 | 2009-06-10 | BorgWarner Inc. | Direct-acting pilot pressure control solenoid |
| IT201600127801A1 (en) * | 2016-12-16 | 2018-06-16 | Walvoil Spa | HYDRAULIC SERVO WITH DIFFERENTIAL AREA |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2276953B1 (en) | 2008-04-28 | 2018-05-23 | BorgWarner Inc. | Overmolded or pressed-in sleeve for hydraulic guiding of a solenoid valve |
| FR2938309B1 (en) | 2008-11-12 | 2010-10-29 | Bosch Rexroth Dsi Sas | PRESSURE REGULATION DEVICE, IN PARTICULAR OF THE HYDRAULIC REMOTE CONTROL TYPE |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2273178A1 (en) * | 1974-05-31 | 1975-12-26 | Bennes Marrel | |
| GB1494400A (en) * | 1974-11-07 | 1977-12-07 | Nordhydraulic Ab | Device for hydraulic control of a centered multiposition directional control valve |
| FR2376978A1 (en) | 1977-01-06 | 1978-08-04 | Rexroth Sigma | IMPROVEMENTS TO FLUID DISTRIBUTOR DEVICES, ESPECIALLY FOR HYDRAULIC REMOTE CONTROL |
| WO1981003686A1 (en) * | 1980-06-16 | 1981-12-24 | Caterpillar Tractor Co | Pressure reducing valve with floating stem for make-up vent |
| FR2507732A1 (en) | 1981-06-12 | 1982-12-17 | Rexroth Sigma | Pressure reducer for remotely controlled hydraulic actuator - has piston with peripheral grooves around active area to reduce pressure hysteresis at output |
| US4461320A (en) * | 1981-07-09 | 1984-07-24 | Fiat Allis Europe S.P.A. | Manually operable hydraulic control device with hydraulic position retention |
| FR2557218A1 (en) * | 1983-12-21 | 1985-06-28 | Bennes Marrel | HYDRAULIC REMOTE CONTROL TRANSMITTER WITH FLOW AMPLIFIERS |
| GB2293642A (en) * | 1994-09-29 | 1996-04-03 | Dana Corp | Pre-detent tactile feedback assembly for a fluid control valve |
-
1999
- 1999-05-12 FR FR9906088A patent/FR2793532B1/en not_active Expired - Fee Related
-
2000
- 2000-05-09 AT AT00401265T patent/ATE263929T1/en not_active IP Right Cessation
- 2000-05-09 EP EP00401265A patent/EP1052414B1/en not_active Expired - Lifetime
- 2000-05-09 DE DE60009598T patent/DE60009598T2/en not_active Expired - Fee Related
- 2000-05-12 JP JP2000139940A patent/JP2000357016A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2273178A1 (en) * | 1974-05-31 | 1975-12-26 | Bennes Marrel | |
| GB1494400A (en) * | 1974-11-07 | 1977-12-07 | Nordhydraulic Ab | Device for hydraulic control of a centered multiposition directional control valve |
| FR2376978A1 (en) | 1977-01-06 | 1978-08-04 | Rexroth Sigma | IMPROVEMENTS TO FLUID DISTRIBUTOR DEVICES, ESPECIALLY FOR HYDRAULIC REMOTE CONTROL |
| WO1981003686A1 (en) * | 1980-06-16 | 1981-12-24 | Caterpillar Tractor Co | Pressure reducing valve with floating stem for make-up vent |
| FR2507732A1 (en) | 1981-06-12 | 1982-12-17 | Rexroth Sigma | Pressure reducer for remotely controlled hydraulic actuator - has piston with peripheral grooves around active area to reduce pressure hysteresis at output |
| US4461320A (en) * | 1981-07-09 | 1984-07-24 | Fiat Allis Europe S.P.A. | Manually operable hydraulic control device with hydraulic position retention |
| FR2557218A1 (en) * | 1983-12-21 | 1985-06-28 | Bennes Marrel | HYDRAULIC REMOTE CONTROL TRANSMITTER WITH FLOW AMPLIFIERS |
| GB2293642A (en) * | 1994-09-29 | 1996-04-03 | Dana Corp | Pre-detent tactile feedback assembly for a fluid control valve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2066941A1 (en) * | 2006-09-26 | 2009-06-10 | BorgWarner Inc. | Direct-acting pilot pressure control solenoid |
| EP2066941A4 (en) * | 2006-09-26 | 2014-11-05 | Borgwarner Inc | Direct-acting pilot pressure control solenoid |
| IT201600127801A1 (en) * | 2016-12-16 | 2018-06-16 | Walvoil Spa | HYDRAULIC SERVO WITH DIFFERENTIAL AREA |
| WO2018109743A1 (en) * | 2016-12-16 | 2018-06-21 | Walvoil S.P.A. | Hydraulic servomechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000357016A (en) | 2000-12-26 |
| ATE263929T1 (en) | 2004-04-15 |
| FR2793532B1 (en) | 2001-08-03 |
| FR2793532A1 (en) | 2000-11-17 |
| DE60009598D1 (en) | 2004-05-13 |
| DE60009598T2 (en) | 2005-06-09 |
| EP1052414B1 (en) | 2004-04-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0757592B1 (en) | Improved precompression pump | |
| CA2172192C (en) | Aerosol container with double-outlet valve | |
| EP0494803B1 (en) | Actuator cap with multiple jets and closure | |
| FR2604640A1 (en) | COATING INSTRUMENT WITH LIQUID; MORE PARTICULARLY, WRITING INSTRUMENT, BEAUTY CARE INSTRUMENT, ETC. | |
| CH645587A5 (en) | MANUALLY OPERATED LIQUID ATOMIZER. | |
| WO2002045866A1 (en) | Fluid or powdery product dispensing device | |
| EP1268083A1 (en) | Dispensing member with outlet valve formed by a differential piston | |
| EP1052414B1 (en) | Fluid valve especially for hydraulic servocontrol | |
| EP0707894B1 (en) | Miniature precompression pump | |
| FR3049198A3 (en) | SEAL AND DECONTAMINATION MECHANISM AND SHOWER HEAD CONTAINING THE MECHANISM | |
| EP1202818B1 (en) | Device for dispensing a fluid product with closure system | |
| FR2746676A1 (en) | DEVICE FOR DISPENSING A SINGLE DOSE OF FLUID PRODUCT | |
| EP1302246A1 (en) | Device for spraying at least one product on a substrate, especially on a keratinous substrate such as skin | |
| FR2675447A1 (en) | PNEUMATIC SERVOMOTOR. | |
| FR2517791A1 (en) | IMPROVEMENTS TO HYDRAULIC DISTRIBUTORS | |
| EP0947754B1 (en) | Pulse-controlled electromagnetic hydraulic valve | |
| FR2488659A1 (en) | MANUAL PUMP WITH SEVERAL EVACUATIONS | |
| FR2721679A1 (en) | Servovalve device having supply and return control valves provided with a common actuator. | |
| CA2092063C (en) | Liquid dispenser comprising a dispensing pump, and dispensing pump therefor | |
| EP0477043B1 (en) | Self-primping hydraulic pump with valves | |
| FR2710558A1 (en) | Device for dispensing a fluid product, with at least two dispensing orifices | |
| EP1355814B1 (en) | Brake booster device with emergency valve | |
| FR3083724A1 (en) | DEVICE FOR DISTRIBUTING A PLURALITY OF COSMETIC PRODUCTS | |
| FR2654793A3 (en) | DEVICE FOR CONTROLLING A TRANSMISSION BOX OF A VEHICLE AS PARTICULARLY AN AGRICULTURAL TRACTOR. | |
| EP0548350A1 (en) | Spray can. |
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 DE GB IT SE |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| 17P | Request for examination filed |
Effective date: 20001021 |
|
| AKX | Designation fees paid |
Free format text: AT DE GB IT SE |
|
| 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): AT DE GB IT SE |
|
| 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: 60009598 Country of ref document: DE Date of ref document: 20040513 Kind code of ref document: P |
|
| REG | Reference to a national code |
Ref country code: SE Ref legal event code: TRGR |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20040723 |
|
| RAP2 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: REXROTH S.A. |
|
| RAP2 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: BOSCH REXROTH |
|
| 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: 20050110 |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: 732E |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: 732E |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20090422 Year of fee payment: 10 Ref country code: IT Payment date: 20090523 Year of fee payment: 10 Ref country code: AT Payment date: 20090423 Year of fee payment: 10 Ref country code: DE Payment date: 20090512 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20090505 Year of fee payment: 10 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20100509 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100509 |
|
| EUG | Se: european patent has lapsed | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100509 Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100510 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20101201 |
|
| 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: 20100509 |