EP0306368B1 - Dispositif compensateur de pression adapté à équiper un distributeur hydraulique du type proportionnel et distributeur hydraulique le comportant - Google Patents

Dispositif compensateur de pression adapté à équiper un distributeur hydraulique du type proportionnel et distributeur hydraulique le comportant Download PDF

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Publication number
EP0306368B1
EP0306368B1 EP88402007A EP88402007A EP0306368B1 EP 0306368 B1 EP0306368 B1 EP 0306368B1 EP 88402007 A EP88402007 A EP 88402007A EP 88402007 A EP88402007 A EP 88402007A EP 0306368 B1 EP0306368 B1 EP 0306368B1
Authority
EP
European Patent Office
Prior art keywords
channel
slide valve
supply
valve
chamber
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
EP88402007A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0306368A1 (fr
Inventor
Maurice Tardy
André Rousset
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.)
Bennes Marrel SA
Original Assignee
Bennes Marrel 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 Bennes Marrel SA filed Critical Bennes Marrel SA
Publication of EP0306368A1 publication Critical patent/EP0306368A1/fr
Application granted granted Critical
Publication of EP0306368B1 publication Critical patent/EP0306368B1/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
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7784—Responsive to change in rate of fluid flow
    • Y10T137/7787—Expansible chamber subject to differential pressures
    • Y10T137/7788—Pressures across fixed choke
    • 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
    • Y10T137/87917—Flow path with serial valves and/or closures
    • Y10T137/88054—Direct response normally closed valve limits direction of flow

Definitions

  • the invention relates to a pressure compensating device adapted to equip a hydraulic distributor of the proportional type provided with a pipe for detecting the operating pressure, as well as a hydraulic distributor comprising this pressure compensating device.
  • the hydraulic distributor comprises, on the main drawer, a fluid inlet flow which is regulated by a compensator drawer, or compensator drawer, the position of which depends on the value of the pressure of prevailing use in the detection pipeline.
  • a compensator drawer or compensator drawer, the position of which depends on the value of the pressure of prevailing use in the detection pipeline.
  • a non-return valve Inside this compensator drawer is a non-return valve whose purpose is to prevent a possible reverse movement of a receiver. Such a reverse movement would tend to develop when a receiver is subjected to a force against which it is desired to move, and this more particularly when the supply pump of the circuit has not yet reached the necessary pressure. to defeat this effort.
  • the present invention aims to avoid these drawbacks by proposing a new organization of the compensator drawer.
  • the invention proposes for this purpose a pressure compensating device for a proportional type hydraulic distributor comprising a distributor drawer, intended to regulate the supply pressure arriving in a supply chamber of this distributor drawer as a function of the pressure of use delivered by this distributor drawer, comprising a compensating drawer, sliding in a housing of a stator portion communicating with an inlet channel and a feed channel opening into the feed chamber, and subject axially, in one direction, at both the operating pressure and the thrust of a compensating spring and, in the other direction, at the supply pressure, this compensating slide carrying a shutter member adapted to isolate hydraulically the inlet and supply channels and subjected to a return spring carried by this compensating drawer, characterized in that the compensating drawer has a low-cut part, the shutter member being an annular valve adapted to slide without play between two abutments around this low-cut part and inside a cylindrical bore into which the feed channel opens, by defining at the bottom of the housing a chamber containing the return spring which communicates permanently by a pipe with the chamber food.
  • the invention also provides a proportional type hydraulic distributor comprising a drawer distributor sliding in a bore of a stator provided with an annular supply chamber and at least one use channel from which a pressure tapping pipe starts, pilot chambers into which the ends of the drawer penetrate , and a pressure compensating device according to the invention through which feed fluid is supplied to the feed chamber.
  • the distributor illustrated in the drawings comprises a stator block 1, in the bore 2 of which slides a cylindrical distributor drawer 3.
  • the switching of the hydraulic circuits is effected by displacement of the grooves of the drawer 3 in front of the lights of the stator .
  • the drawer 3 At its right end, for example, the drawer 3 is provided with a spring return device of known type, comprising a helical spring 4, compressed between the cups 5 and 6 and two rings 7 and 8, trapped between two shoulders of the end 9 of the drawer 3, around which they can slide.
  • a spring return device of known type, comprising a helical spring 4, compressed between the cups 5 and 6 and two rings 7 and 8, trapped between two shoulders of the end 9 of the drawer 3, around which they can slide.
  • the three-position slide 3 is used to control a double-acting hydraulic cylinder 12.
  • one of the sections of the cylinder 12 is connected to a first channel d 'use 13 of the stator 1, while the opposite section of the cylinder 12 is connected to a second pipe for using the stator 1 (not shown).
  • the distributor receives in an annular chamber 15, the pressure sent by a hydraulic unit 16.
  • the supply chamber 15 surrounds a sliding drawer 60 that a compression spring 75, housed in a chamber 18, recalls in abutment against the fixed bottom 19 of the housing 60A of this drawer.
  • the spring 75 is also supported on a base 80 whose position is adjustable by a setting screw 81.
  • An inlet channel 73 opens into the housing 60A which consists of a portion in a bore 20 into which opens a supply channel leading to the supply chamber 70
  • the distributor drawer 3 has an axial internal housing marked 29 in the right end.
  • the housing 29 communicates with the outside of the drawer by two axially offset radial bores referenced respectively 30 and 31. Likewise, the housing at the other end leads to two radial bores.
  • stator defines, in the bore, a solid part 40, in front of which is likely to move a groove 41 of the drawer 3.
  • annular stator chamber 42 Around the drawer 3, in the area around the bore 31 when the drawer 3 is pushed to the left (FIG. 2), there is an annular stator chamber 42.
  • the drawer 3 has a movable groove in front of a solid part of the stator adjacent to an annular stator chamber (not shown).
  • the two annular stator chambers are connected by a pipe 46 called “pipe for the detection of the operating pressure" (or, in English, “load sensing") which communicates permanently with the chamber 18 of the spring 17 which recalls the drawer compensator 60.
  • the groove 41 is adapted to put the pipe 46 in normal communication with a pipe 39 of the fluid return circuit.
  • the compensating slide comprises a solid solid part 61 for guidance extended by a low-cut part 62 on which and around which an annular valve 63 (or ring) sliding in leaktight manner can slide in the bore 20 and comprising, opposite the solid part 61, a housing 21 around the low-cut part 62.
  • a compression spring 64 is supported on one side on a support flange 76 ending the drawer 60, on the other side on the bottom 66 of the housing 21 of the annular valve 63.
  • the spring 64 tends to push the annular valve 63 against a shoulder 67 which connects the low-cut part 62 to the rest of the drawer 60.
  • the shoulder 67 constitutes one of the end stops of the valve 63 .
  • this shoulder 67 connects the low-cut part 62 to a second low-cut zone 23 of intermediate diameter between the diameter of the part 62 and the transverse dimension of the part 61.
  • Balancing channels 51 are provided in the support flange 76.
  • a pipe 68 here produced in the stator body 65, permanently connects the rear chamber 69 of the annular valve 63 (containing the spring 64) to the pressure prevailing in the supply chamber 70 of the main drawer 3, upstream a throttle 72 which is formed in operation with a distribution groove 71 ( Figure 2).
  • the fluid coming from the supply orifice 73 (arrow 74) in the supply chamber 15 of the compensating slide 60 is directed towards the chamber 70 passing, in the configuration of FIG. 2, through an annular section important.
  • the communication between the chambers 70 and 69 is made by holes 68 'made in the annular valve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Safety Valves (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
EP88402007A 1987-08-03 1988-08-02 Dispositif compensateur de pression adapté à équiper un distributeur hydraulique du type proportionnel et distributeur hydraulique le comportant Expired - Lifetime EP0306368B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR878711435A FR2619192B2 (fr) 1987-08-03 1987-08-03 Distributeur hydraulique du type proportionnel avec prise d'informations concernant les plus fortes pressions dans les circuits d'utilisation
FR8711435 1987-08-03

Publications (2)

Publication Number Publication Date
EP0306368A1 EP0306368A1 (fr) 1989-03-08
EP0306368B1 true EP0306368B1 (fr) 1991-05-02

Family

ID=9354106

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88402007A Expired - Lifetime EP0306368B1 (fr) 1987-08-03 1988-08-02 Dispositif compensateur de pression adapté à équiper un distributeur hydraulique du type proportionnel et distributeur hydraulique le comportant

Country Status (6)

Country Link
US (1) US4842019A (ja)
EP (1) EP0306368B1 (ja)
JP (1) JPS6449701A (ja)
DE (1) DE3862631D1 (ja)
DK (1) DK166224C (ja)
FR (1) FR2619192B2 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2672944A1 (fr) * 1991-02-15 1992-08-21 Bennes Marrel Distributeur proportionnel et ensemble de commande d'une pluralite de recepteurs hydrauliques comportant pour chaque recepteur un tel distributeur.
US5203668A (en) * 1991-06-06 1993-04-20 E. Fisher Apparatus for loading and unloading of a container structure or other loads with respect to a truck body or trailer
JPH0828505A (ja) * 1994-07-12 1996-02-02 Komatsu Ltd 圧力補償弁
US5791142A (en) * 1997-03-27 1998-08-11 Husco International, Inc. Hydraulic control valve system with split pressure compensator
DE10135298A1 (de) * 2001-07-24 2003-02-13 Bosch Rexroth Ag Ventilanordnung
FI123735B (fi) 2011-01-14 2013-10-15 Parker Hannifin Mfg Finland Oy Painekompensoinnilla varustettu suuntaventtiili

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2562632A1 (fr) * 1984-04-18 1985-10-11 Bennes Marrel Distributeur hydraulique du type proportionnel, avec prise d'informations concernant les plus fortes pressions dans les circuits d'utilisation

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600702A (en) * 1945-11-29 1952-06-17 William T Stephens Control valve
US3881512A (en) * 1973-09-21 1975-05-06 Koehring Co Hydraulic control valve and pressure compensating mechanism therefor
DE2547889A1 (de) * 1975-10-25 1977-05-05 Bosch Gmbh Robert Schieberventil
US4515181A (en) * 1983-05-25 1985-05-07 Caterpillar Tractor Co. Flow control valve assembly wth quick response
FR2567233B1 (fr) * 1984-07-03 1986-12-12 Bennes Marrel Tiroir assiste pour la compensation de pression dans un distributeur hydraulique
JPH103115A (ja) * 1996-06-17 1998-01-06 Nikon Corp 撮像装置における機能設定装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2562632A1 (fr) * 1984-04-18 1985-10-11 Bennes Marrel Distributeur hydraulique du type proportionnel, avec prise d'informations concernant les plus fortes pressions dans les circuits d'utilisation

Also Published As

Publication number Publication date
DK429888A (da) 1989-02-04
DE3862631D1 (de) 1991-06-06
EP0306368A1 (fr) 1989-03-08
DK166224B (da) 1993-03-22
JPS6449701A (en) 1989-02-27
US4842019A (en) 1989-06-27
DK166224C (da) 1993-08-16
FR2619192A2 (fr) 1989-02-10
FR2619192B2 (fr) 1989-12-29
DK429888D0 (da) 1988-08-02

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