EP1052414A1 - Dispositif distributeur de fluide notamment pour télécommande hydraulique - Google Patents
Dispositif distributeur de fluide notamment pour télécommande hydraulique 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
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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)
- Actuator (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Fluid Pressure (AREA)
- Details Of Reciprocating Pumps (AREA)
- Fluid-Driven Valves (AREA)
Abstract
Description
- 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.
- 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.
Claims (8)
- Dispositif distributeur de fluide, notamment pour télécommande hydraulique, comprenant au moins un réducteur de pression (2) monté dans un corps (1) et un organe de commande (19) propre à modifier le tarage du réducteur, lequel réducteur (2) comporte un plongeur (3) déplaçable, par le susdit organe de commande (19), dans une cavité (4) du corps (1) qui comprend, d'un côté, un logement (5) 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 (9) communiquant, axialement à l'opposé du susdit logement (5), avec une chambre (13) de départ du fluide de télécommande et, latéralement, avec une chambre (12) alimentée en fluide sous pression (P) en provenance d'une source de fluide sous pression, ledit alésage (9) abritant une partie active (10) du plongeur (3) traversée par un canal (22) ayant un orifice axial débouchant vers la chambre de départ (13) et un orifice latéral (23) propre à être mis en communication sélectivement avec le logement (5) ou la chambre d'alimentation (12) pour assurer la fonction de réduction de pression de fluide de télécommande lors du déplacement du plongeur dans l'alésage (9),
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). - Dispositif distributeur de fluide selon la revendication 1, caractérisé en ce que la portion (24) de rayon moindre de la partie active (10) du plongeur (3) est annulaire et coaxiale à la partie active du plongeur.
- Dispositif distributeur de fluide selon la revendication 1, caractérisé en ce que la portion (24) de rayon moindre de la partie active du plongeur est unique.
- Dispositif distributeur de fluide selon la revendication 1, caractérisé en ce que plusieurs portions (24) de rayon moindre sont prévues sur la périphérie de la partie active du plongeur.
- Dispositif distributeur de fluide selon la revendication 4, caractérisé en ce que les portions (24) de rayon moindre sont disposés symétriquement sur le pourtour de la partie active du plongeur.
- Dispositif distributeur de fluide selon la revendication 5, caractérisé en ce que les portions (24) de rayon moindre sont au nombre de deux diamétralement opposées.
- Dispositif distributeur de fluide selon la revendication 5, caractérisé en ce que les portions (24) de rayon moindre sont au nombre de quatre, deux à deux diamétralement opposées.
- Dispositif distributeur de fluide selon l'une quelconque des revendications 3 à 7, caractérisé en ce que chaque portion (24) de rayon moindre est un plat.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9906088 | 1999-05-12 | ||
FR9906088A FR2793532B1 (fr) | 1999-05-12 | 1999-05-12 | Dispositif distributeur de fluide notamment pour telecommande hydraulique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1052414A1 true EP1052414A1 (fr) | 2000-11-15 |
EP1052414B1 EP1052414B1 (fr) | 2004-04-07 |
Family
ID=9545540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00401265A Expired - Lifetime EP1052414B1 (fr) | 1999-05-12 | 2000-05-09 | Dispositif distributeur de fluide notamment pour télécommande hydraulique |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1052414B1 (fr) |
JP (1) | JP2000357016A (fr) |
AT (1) | ATE263929T1 (fr) |
DE (1) | DE60009598T2 (fr) |
FR (1) | FR2793532B1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2066941A1 (fr) * | 2006-09-26 | 2009-06-10 | BorgWarner Inc. | Électrovanne de commande de pression pilote par action directe |
IT201600127801A1 (it) * | 2016-12-16 | 2018-06-16 | Walvoil Spa | Servocomando idraulico ad area differenziale |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3550188A1 (fr) | 2008-04-28 | 2019-10-09 | BorgWarner Inc. | Vanne comprenant un manchon surmoulé ou embouti pour routage hydraulique de solénoïde |
FR2938309B1 (fr) * | 2008-11-12 | 2010-10-29 | Bosch Rexroth Dsi Sas | Dispositif de regulation de pression, notamment du type telecommande hydraulique |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2273178A1 (fr) * | 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 (fr) | 1977-01-06 | 1978-08-04 | Rexroth Sigma | Perfectionnements aux dispositifs distributeurs de fluide, notamment pour telecommande hydraulique |
WO1981003686A1 (fr) * | 1980-06-16 | 1981-12-24 | Caterpillar Tractor Co | Soupape de reduction de pression avec tige flottante pour event d'appoint |
FR2507732A1 (fr) | 1981-06-12 | 1982-12-17 | Rexroth Sigma | Perfectionnements apportes aux plongeurs pour reducteurs de pression de fluide, reducteurs et distributeurs equipes de tels plongeurs |
US4461320A (en) * | 1981-07-09 | 1984-07-24 | Fiat Allis Europe S.P.A. | Manually operable hydraulic control device with hydraulic position retention |
FR2557218A1 (fr) * | 1983-12-21 | 1985-06-28 | Bennes Marrel | Emetteur hydraulique de commande a distance avec amplificateurs de debit |
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/fr not_active Expired - Fee Related
-
2000
- 2000-05-09 AT AT00401265T patent/ATE263929T1/de not_active IP Right Cessation
- 2000-05-09 DE DE60009598T patent/DE60009598T2/de not_active Expired - Fee Related
- 2000-05-09 EP EP00401265A patent/EP1052414B1/fr not_active Expired - Lifetime
- 2000-05-12 JP JP2000139940A patent/JP2000357016A/ja active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2273178A1 (fr) * | 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 (fr) | 1977-01-06 | 1978-08-04 | Rexroth Sigma | Perfectionnements aux dispositifs distributeurs de fluide, notamment pour telecommande hydraulique |
WO1981003686A1 (fr) * | 1980-06-16 | 1981-12-24 | Caterpillar Tractor Co | Soupape de reduction de pression avec tige flottante pour event d'appoint |
FR2507732A1 (fr) | 1981-06-12 | 1982-12-17 | Rexroth Sigma | Perfectionnements apportes aux plongeurs pour reducteurs de pression de fluide, reducteurs et distributeurs equipes de tels plongeurs |
US4461320A (en) * | 1981-07-09 | 1984-07-24 | Fiat Allis Europe S.P.A. | Manually operable hydraulic control device with hydraulic position retention |
FR2557218A1 (fr) * | 1983-12-21 | 1985-06-28 | Bennes Marrel | Emetteur hydraulique de commande a distance avec amplificateurs de debit |
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 (fr) * | 2006-09-26 | 2009-06-10 | BorgWarner Inc. | Électrovanne de commande de pression pilote par action directe |
EP2066941A4 (fr) * | 2006-09-26 | 2014-11-05 | Borgwarner Inc | Électrovanne de commande de pression pilote par action directe |
IT201600127801A1 (it) * | 2016-12-16 | 2018-06-16 | Walvoil Spa | Servocomando idraulico ad area differenziale |
WO2018109743A1 (fr) * | 2016-12-16 | 2018-06-21 | Walvoil S.P.A. | Servomécanisme hydraulique |
Also Published As
Publication number | Publication date |
---|---|
ATE263929T1 (de) | 2004-04-15 |
FR2793532A1 (fr) | 2000-11-17 |
JP2000357016A (ja) | 2000-12-26 |
DE60009598D1 (de) | 2004-05-13 |
EP1052414B1 (fr) | 2004-04-07 |
DE60009598T2 (de) | 2005-06-09 |
FR2793532B1 (fr) | 2001-08-03 |
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