EP1024299B1 - Distributeur hydraulique - Google Patents

Distributeur hydraulique Download PDF

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Publication number
EP1024299B1
EP1024299B1 EP20000400166 EP00400166A EP1024299B1 EP 1024299 B1 EP1024299 B1 EP 1024299B1 EP 20000400166 EP20000400166 EP 20000400166 EP 00400166 A EP00400166 A EP 00400166A EP 1024299 B1 EP1024299 B1 EP 1024299B1
Authority
EP
European Patent Office
Prior art keywords
plunger
control valve
pressure
directional control
hydraulic
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.)
Expired - Lifetime
Application number
EP20000400166
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1024299A1 (fr
Inventor
Michel Rivolier
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.)
Bosch Rexroth SAS
Original Assignee
Mannesmann Rexroth SA
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 Mannesmann Rexroth SA filed Critical Mannesmann Rexroth SA
Publication of EP1024299A1 publication Critical patent/EP1024299A1/fr
Application granted granted Critical
Publication of EP1024299B1 publication Critical patent/EP1024299B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
    • F15B13/0417—Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87177—With bypass
    • Y10T137/87185—Controlled by supply or exhaust valve

Definitions

  • the present invention relates to improvements made to hydraulic distributors comprising a regulatory balance capable of ensuring most charge pressure detection function high, an anti-saturation function and a flow division independent of the load, this balance comprising a plunger movable in a housing under the action a pressure differential generated by the intake pressure supplied by a hydraulic source applying to a first its ends and by the highest charge pressure applying to its other end, said plunger being clean also to be released, in proportion to the above differential of pressure, a side port of the housing connected to a port of distributor work to deliver hydraulic fluid under the intake pressure reduced by the above differential pressure.
  • the dispenser comprises a body 1 provided with a orifice P for admission of the pressurized fluid in from a hydraulic source (not shown).
  • said orifice P is constituted under shape of a channel 2 crossing the body 1 transversely on the drawing plane and opening on both sides main of said body serving as support during stacking side by side and one against the other of several distributors.
  • At least one orifice T (formed as of a channel crossing the body 1 transversely to the plane of the drawing and opening onto the two main faces said body) is used for the return of the fluid to a reservoir (not shown).
  • Two working ports A, B are connectable to a hydraulic device or receiver (not represented).
  • a distribution drawer 4 is suitable for slide in a bore 5 which crosses longitudinally the body 1 and opens on two opposite end faces 6, 7 of it.
  • the body 1 and the drawer 4 have passages and / or pipes and / or grooves arranged to cooperate with a view to to establish and / or interrupt the connections between various orifices P, A, B, T of the distributor body according to the axial position occupied by the slide in the bore.
  • the specific arrangements of these passages and / or pipes and / or grooves are determined by the man of the profession in relation to the desired functions for the distributor.
  • the body 1 has yet another transverse channel 8 extending between the main faces of the body and combined with at minus a pressure selector for transmitting, in a channel 18 located downstream of the distributor drawer 4, strongest (load sensing pressure or LS pressure) of the two pressures constituted respectively by the pressure in said channel upstream of the distributor and the distributor working pressure.
  • Channel 2 connected to the intake port P opens into the bore 5 of the body in a chamber intake 10 thereof, near which a another room 11 communicates, through a passage 12, with a housing 13 in which is mounted to slide freely seals a plunger 14.
  • the passage 12 opens into the housing 13 at one end of it, here the end lower (corresponding to an end face of the plunger 14, here its lower end), while at its opposite end (here its upper end) the housing 13 opens into a cavity 15 in which can move the head 16 of the plunger 14.
  • the enlarged head 16 relative to the body of the diver can rest on a shoulder formed at the outlet of the housing 13 in the cavity 15 to retain the plunger 14.
  • a spring 17 is provided in the cavity 15 to repel the plunger 14 against said shoulder so as to fix its position in the absence of pressure.
  • the aforementioned channel 8 leads into the cavity 15, so that the pressure in the channel 3 is also present in cavity 15 and is then exerted on the corresponding end of the plunger 14 (here its upper end).
  • the plunger 14 is crossed by a channel axial 18 opening, on one side, into its end face opposite passage 12 and, on the other side, in a canal diametral 19 passing through the plunger 14 and disposed of so as to be closed by the wall of the housing 13 when the plunger 14 is in the rest position imposed by the spring 17 (shown in Figure 1) or in a position not completely raised.
  • Part 28 of the axial channel 18 is arranged in the form of a restriction or a nozzle.
  • the portion of the drawer 4 which extends, in position neutral, between chambers 10 and 11 by isolating them one on the other is provided with progressivity notches 20 intended to ensure a controlled flow of the fluid hydraulic in the correct direction when the drawer is moved one way or the other.
  • Such dispenser is not intended to be used alone, but to be associated with several other distributors of the same type to constitute a distribution device multiple hydraulics.
  • a distribution tranche considered i.e. a unitary distributor
  • the distribution tranche considered may continue to be maneuvered so that the receiver hydraulic that it controls can be set or maintained in operation, if only with a speed reduced: this can be the case for example for the rotation of a machine turret or for translation of a machine.
  • the object of the invention is therefore to propose an arrangement that responds to user wishes while requiring only minimal adjustments compared to the structures existing distributors.
  • a hydraulic distributor as defined in is characterized, being arranged in accordance with the invention, in that the housing wall and / or the plunger, in an area included in the vicinity of the above first end of the plunger, is equipped with at least one calibrated passage suitable for establishing a connection between the abovementioned first end of the plunger and the aforesaid lateral opening when the plunger is pushed back into position extreme under the action of the highest charge pressure exceeding the inlet pressure.
  • the presence of the calibrated passage means that the regulator pressure of the distributor balance is no longer exactly the existing pressure differential ⁇ p, between the inlet pressure (P) and the highest charge pressure (LS), as it is conveyed in the LS line and applied to the first end of the plunger.
  • the calibrated passage may, from a point of view functional, either be provided in the wall of the housing or in the diver, it is however more advantageous, to facilitate machining, that said calibrated passage is machined in the plunger.
  • calibrated passages can be provided and distributed peripherally, advantageously regularly.
  • each pass is consisting of a notch cut into the wall.
  • it can also be a channel with a calibrated restriction.
  • FIG. 2 on which the same reference numbers have been kept to designate the organs identical to those of FIG. 1, there is shown a view enlarged with a regulatory balance such as that equipping the hydraulic distributor of fig. 1, except that the restriction 28 provided in channel 18 is here provided in a insert 29 inserted in the plunger 14.
  • the arrangement according to the invention consists in providing, between the passage 12 receiving the fluid under the intake pressure P and the conduit 21 connected to a working orifice A, B, a passage permanent calibrated which ensures a low fluid flow flow rate when plunger 14 is pushed back to inhibition position functional of the distributor under the action of a pressure of highest load LS, prevailing in upper chamber 15, which exceeds the intake pressure P (case illustrated in fig. 2).
  • calibrated passages 30 are provided in the plunger 14, distributed peripherally and formed here by notches carved into the outer wall of the plunger extending parallel to the axis thereof.
  • This is a mode of simple in terms of structure and which does not requires minimal machining without any difficulty technical. It should be noted in this regard that the realization of such notches can not only be, of course, performed on new materials during the manufacture of these, but may also be done on pre-existing materials so as to provide them with the additional function of pseudo-priority mentioned above.
  • the calibrated passages 31 are formed under form of radial channels with restriction, which, from the point manufacturing view, is achievable without major difficulty.
  • the calibrated passages are practiced in the wall of the housing 13 by joining the passage 12 and the conduit 21, either in the form of notches 32 hollowed out in the wall of the housing 13 at the lower end of the plunger 14 (fig. 4), or in the form of restricted channels 33 (fig. 5) dug in the body 1 of the distributor behind the surface of the housing 13.
  • the arrangements shown in FIGS. 4 and 5 can pose manufacturing problems in the usual context of monobloc body where the locations to be machined are accessible difficult.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Multiple-Way Valves (AREA)
  • Valve Device For Special Equipments (AREA)
  • Fluid-Driven Valves (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)
EP20000400166 1999-01-26 2000-01-21 Distributeur hydraulique Expired - Lifetime EP1024299B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9900820 1999-01-26
FR9900820A FR2788817B1 (fr) 1999-01-26 1999-01-26 Distributeur hydraulique

Publications (2)

Publication Number Publication Date
EP1024299A1 EP1024299A1 (fr) 2000-08-02
EP1024299B1 true EP1024299B1 (fr) 2004-01-07

Family

ID=9541221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000400166 Expired - Lifetime EP1024299B1 (fr) 1999-01-26 2000-01-21 Distributeur hydraulique

Country Status (6)

Country Link
US (1) US6267141B1 (enrdf_load_stackoverflow)
EP (1) EP1024299B1 (enrdf_load_stackoverflow)
JP (1) JP2000220605A (enrdf_load_stackoverflow)
AT (1) ATE257549T1 (enrdf_load_stackoverflow)
DE (1) DE60007566T2 (enrdf_load_stackoverflow)
FR (1) FR2788817B1 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10219718B4 (de) * 2002-05-02 2007-06-06 Sauer-Danfoss Aps Hydraulische Ventilanordnung
DE10219719A1 (de) * 2002-05-02 2003-11-27 Sauer Danfoss Nordborg As Nord Hydraulische Ventilanordnung
DE10219717B3 (de) * 2002-05-02 2004-02-05 Sauer-Danfoss (Nordborg) A/S Hydraulische Ventilanordnung
JP7139297B2 (ja) * 2019-09-25 2022-09-20 日立建機株式会社 流量制御弁

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3431028A (en) * 1966-02-21 1969-03-04 Herbert G Yoder Brake system and method of operation
JPS53106840A (en) * 1977-02-25 1978-09-18 Teijin Ltd Method of manufacture of polyester filament yarn to be harddtwisted for crepe woven or knitted fabric
US4256142A (en) * 1979-08-20 1981-03-17 Hancock Leonard H Hydraulic control
JPS58203202A (ja) * 1982-05-22 1983-11-26 Daikin Ind Ltd 油圧回路
US4519419A (en) * 1982-06-15 1985-05-28 Commercial Shearing, Inc. Hydraulic valves
US4716933A (en) * 1986-10-16 1988-01-05 J. I. Case Company Valve unit
JPH026801A (ja) * 1988-06-27 1990-01-11 Kobe Steel Ltd 圧力晶析方法
FR2689575B1 (fr) 1992-04-06 1994-07-08 Rexroth Sigma Distributeur hydraulique a compensation de pression et une selection de pression maximale pour piloter une pompe et commande hydraulique multiple incluant de tels distributeurs.
JP3335743B2 (ja) * 1993-12-28 2002-10-21 カヤバ工業株式会社 建設車両の直進走行制御装置

Also Published As

Publication number Publication date
EP1024299A1 (fr) 2000-08-02
DE60007566T2 (de) 2004-11-25
DE60007566D1 (de) 2004-02-12
FR2788817A1 (fr) 2000-07-28
US6267141B1 (en) 2001-07-31
JP2000220605A (ja) 2000-08-08
ATE257549T1 (de) 2004-01-15
FR2788817B1 (fr) 2001-04-06

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