US3500865A - Hydraulically operable control valve - Google Patents

Hydraulically operable control valve Download PDF

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Publication number
US3500865A
US3500865A US719392A US3500865DA US3500865A US 3500865 A US3500865 A US 3500865A US 719392 A US719392 A US 719392A US 3500865D A US3500865D A US 3500865DA US 3500865 A US3500865 A US 3500865A
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US
United States
Prior art keywords
valve
servo
spring
valve spool
control valve
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
US719392A
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English (en)
Inventor
Jurgen Gerber
Friedrich Fichtner
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.)
Orenstein Koppel und Luebecker Maschinenbau AG
CNH Industrial Baumaschinen GmbH
Original Assignee
O&K Orenstein and Koppel GmbH
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 O&K Orenstein and Koppel GmbH filed Critical O&K Orenstein and Koppel GmbH
Application granted granted Critical
Publication of US3500865A publication Critical patent/US3500865A/en
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
    • F15B13/042—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
    • 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
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2574—Bypass or relief controlled by main line fluid condition
    • Y10T137/2605—Pressure responsive
    • Y10T137/2607—With pressure reducing inlet valve
    • Y10T137/261—Relief port through common sensing means
    • 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
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86582—Pilot-actuated

Definitions

  • a valve system comprising a hydraulically operable main control valve, and a manually adjustable servovalve for controlling said main control valve, in which said main control valve in addition to a reciprocable main valve spool includes at each end of said main valve spool an auxiliary piston and a return spring, both return springs tending to hold said main valve spool in its neutral position, and in which the adjustment of the servovalve spool, which has an annular shoulder communicating with a conduit for feeding oil under pressure to said main control valve, is elfected by a manually operable push rod through the intervention of a control spring preloaded by a screw and a spring dish.
  • the present invention relates to a hydraulically operable control valve with a control piston, the stroke of Iwhich is dependent on the actuating stroke of a servovalve.
  • FIGURE 1 is a longitudinal section through a main control valve for an arrangement according to the present invention.
  • FIGURE 2 is a section through a servo-valve for use characterized primarily, in that the main control valve t has associated therewith auxiliary pistons and return springs, and that the adjustment of ⁇ the piston of the servo-valve, which piston is designed as a step piston, is t effected by a push rodthrough theintervention of a control spring which is preloaded by awscrew and a spring dish.
  • the arrangement is furthermore characterized in that the annular surface of the said stepped piston faces the connection for the control oil.
  • the arrangement shown therein comprises a main valve 2 (FIG. 1) associated with a Working cylinder 1, for instance, the cylinder of a loading bucket, and furthermore comprises a servo-valve 3 (FIG. 2).
  • the said cylinders 2 and 3, are interconnected through hydraulic conduits 4, 4a, while the main control valve 2 is connected with the working cylinder 1 through conduits 7 and 8.
  • the oil under pressure for actuating the working piston 1a for cylinder 1 is delivered by a pump 9.
  • the oil under pressure for adjusting the control spool 13 is delivered by a servopump 21.
  • the oil under pressure not required for the Iworking cylinder 1 and the servo-pumps 9 and 21 is discharged to the oil reservoirs 10i and 11, respectively, through check valves 32 and 32a, respectively.
  • the valve spool 13 is displaceably arranged in the housing 12 of the main control valve 2.
  • the housing 12 is closed at both ends by covers 14 and 14a, respectively.
  • Within said covers .14 and ,14a are respectively mounted bushings 15 and 15a which serve for guiding the auxiliary pistons 16 and 16a, respectively.
  • the servo-valve 3 comprises a housing 20 which receives oil under pressure from the servo-pump 21. Re-
  • a stepped valve spool 22 provided with an annular surface 25.
  • a screw 27 is Screwed into that end face 26 of the valve spool 22 which faces toward the push rod 23.
  • the head 28 of said screw 27 extends into a pot-shaped spring dish 29. It will thus be appreciated that the tension of the spring 6 which is clamped between the end face 26 and the surface 30 facing said screw head 28 can be adjusted by means of said screw 27.
  • the push rod 23 is guided in a closing bushing 31 which is screwed into the housing 20.
  • the servo-pump 21 conveys oil under pressure into the reservoir 11 against the maximum pressure adjusted by the check valve 32a.
  • the bore 33 in housing 20 of the servo-valve 3 communicates through line 4 with the chamber 34a (FIG. l) of the closure 14a of the control valve 2.
  • the bore 33 communicates with the oil reservoir 11 through the bore 35 in the stepped valve spool 22,
  • valve spool 13 of the main control valve 2 will, due to the fact that it is actuated by the servo-piston 16a, move against the abutment 39, and the servo-pump 21 will overcome the pressure adjusted on the check valve 32a, and will feed to the oil reservoirs 11.
  • the said chambers 40 and 40a are through bores 41 and 41a and annular passages 42 and 42a connected to the oil reservoir 11.
  • the main control spool passes through a very narrow fine control range.
  • a valve system comprising a fluid operable main control valve, and a manually adjustable servo-valve for controlling said main control valve
  • said main control valve includes a reciprocable lmain valve spool and has adjacent each end of said main valve spool a fluid operable plunger for acting upon said main valve spool and a return spring operable to act upon the respective adjacent plunger, both return springs being operable through said plungers to return said main valve spool to a neutral position
  • said servo-valve includes rst conduit means for connection with a source of pressure fluid, second conduit means for conveying uid to one of said plungers, a reciprocable servo-valve spool for controlling the communication between said first and second conduit means, said servo-valve spool having an annular shoulder in fluid communication with said second conduit means, manually adjustable means, spring dish means connected to the manually adjustable means, a first spring interposed between said spring dish means and the adjacent end of said servo-valve spool
  • a valve system which includes two bushings respectively associated with said plungers for guiding the same, one side of each bushing facing in the direction toward said main valve spool and being provided with a recess with a surface forming an abutment for said main valve spool, housing means respectively surrounding said bushings, two spring dishes respectively resting on that side of the respective bushing which is opposite to said one bushing side, said return springs respectively being interposed between and resting on the respective spring dish and the adjacent housing means.
  • a valve system according to claim 2 which includes conduit means leading from said recesses to the outside of said main control valve for conveying leakage oil to an oil reservoir.
  • a hydraulically operable valve system which in eludes: main valve means, and servo-valve means hydraulically connected to said main valve means; said main valve means comprising a reciprocable main valve spool controlling the ow of actuating uid to and from a cylinder piston system to be controlled, two plunger means respectively arranged on opposite ends of said main valve spool and respectively operable by pressure fluid to respectively move in one direction and the opposite direction to thereby move said main valve spool in said one or the other direction, and return spring means continuously urging said main valve spool to a neutral position in which fluid communication of said main valve means with a cylinder piston system to be controlled is interrupted; said servo-valve means including a reciprocable stepped servo-valve spool with an annular shoulder surface operable to be acted upon by pressure fluid conveyed through said servo-valve means to said main control valve means, a manually operable control member arranged in axial alignment with and in axially spaced relationship to said servo-

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Servomotors (AREA)
  • Hydraulic Motors (AREA)
  • Actuator (AREA)
  • Multiple-Way Valves (AREA)
US719392A 1967-04-19 1968-04-08 Hydraulically operable control valve Expired - Lifetime US3500865A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEO0012446 1967-04-19

Publications (1)

Publication Number Publication Date
US3500865A true US3500865A (en) 1970-03-17

Family

ID=7352790

Family Applications (1)

Application Number Title Priority Date Filing Date
US719392A Expired - Lifetime US3500865A (en) 1967-04-19 1968-04-08 Hydraulically operable control valve

Country Status (7)

Country Link
US (1) US3500865A (enrdf_load_stackoverflow)
JP (1) JPS505410B1 (enrdf_load_stackoverflow)
BE (1) BE713559A (enrdf_load_stackoverflow)
DE (1) DE1600876B2 (enrdf_load_stackoverflow)
FR (1) FR1573195A (enrdf_load_stackoverflow)
GB (1) GB1214713A (enrdf_load_stackoverflow)
SE (1) SE342671B (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766944A (en) * 1971-10-20 1973-10-23 Rexroth Gmbh G L Pilot controlled fluid flow regulating valve
DE2523937A1 (de) * 1974-05-31 1975-12-18 Bennes Marrel Saint Etienne Fa Hydraulische steuervorrichtung
US4122864A (en) * 1974-05-31 1978-10-31 Bennes Marrel Selective and proportional hydraulic remote control device, in particular for handling and public work gears
US5103866A (en) * 1991-02-22 1992-04-14 Foster Raymond K Poppet valve and valve assemblies utilizing same
US20150308325A1 (en) * 2012-12-05 2015-10-29 Hydac Fluidtechnik Gmbh Device for controlling the operation of a ventilator, which can be driven by a hydraulic motor, of a cooling device
CN110513511A (zh) * 2019-08-28 2019-11-29 奥瑞拓能源科技股份有限公司 一种配气装置
CN112833218A (zh) * 2021-02-18 2021-05-25 涌镇液压机械（上海）有限公司 双路负载比例换向阀

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5311694B2 (enrdf_load_stackoverflow) * 1972-03-27 1978-04-24
JPS5613207B2 (enrdf_load_stackoverflow) * 1972-05-27 1981-03-26
DE2604108A1 (de) * 1975-02-04 1976-08-05 Caterpillar Tractor Co Drosselschlitz fuer einen ventilkolben
US4011892A (en) * 1975-03-14 1977-03-15 Marotta Scientific Controls, Inc. Three port non-interflow poppet valve
GB2041163B (en) * 1979-01-29 1982-11-24 Fields R E Slider valves
SE458704B (sv) * 1987-05-18 1989-04-24 Atlas Copco Ab Anordning vid ett hydrauliskt drivsystem anslutet till en lastdrivande hydraulmotor
FR2857706B1 (fr) * 2003-07-17 2007-05-04 Bosch Rexroth Dsi Sas Dispositif distributeur de fluide sous pression a double ressorts de regulation
ITMO20050247A1 (it) * 2005-09-29 2007-03-30 Studio Tecnico 6M Srl Valvola per la frenatura idraulica di macchine operatrici o simili
CN114215925B (zh) * 2021-12-23 2023-06-30 国能(福州)热电有限公司 调节阀

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB720966A (en) * 1953-05-21 1954-12-29 Crosby Donald Philipps Smallpe Pneumatic valves
US2751182A (en) * 1956-06-19 Shift valve mechanism and controlsx
US2870789A (en) * 1956-01-11 1959-01-27 Bilaisis Viktoras Pneumatically operated control valve for hydraulic actuators
FR1333554A (fr) * 1962-09-14 1963-07-26 Teves Kg Alfred Circuit hydraulique pour valve à tiroir
US3200845A (en) * 1962-07-18 1965-08-17 Kayaba Industry Co Ltd Pilot operated fluid direction change-over valve
US3304953A (en) * 1964-01-02 1967-02-21 Ohio Brass Co Fluid power system and valve mechanisms therefor
US3340897A (en) * 1965-05-07 1967-09-12 Ohio Brass Co Fluid control mechanism

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL94431C (enrdf_load_stackoverflow) * 1951-02-06 1900-01-01
US2989986A (en) * 1958-04-25 1961-06-27 Caterpillar Tractor Co Hydraulic control valve for actuating steering clutches or the like

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2751182A (en) * 1956-06-19 Shift valve mechanism and controlsx
GB720966A (en) * 1953-05-21 1954-12-29 Crosby Donald Philipps Smallpe Pneumatic valves
US2870789A (en) * 1956-01-11 1959-01-27 Bilaisis Viktoras Pneumatically operated control valve for hydraulic actuators
US3200845A (en) * 1962-07-18 1965-08-17 Kayaba Industry Co Ltd Pilot operated fluid direction change-over valve
FR1333554A (fr) * 1962-09-14 1963-07-26 Teves Kg Alfred Circuit hydraulique pour valve à tiroir
US3304953A (en) * 1964-01-02 1967-02-21 Ohio Brass Co Fluid power system and valve mechanisms therefor
US3340897A (en) * 1965-05-07 1967-09-12 Ohio Brass Co Fluid control mechanism

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766944A (en) * 1971-10-20 1973-10-23 Rexroth Gmbh G L Pilot controlled fluid flow regulating valve
DE2523937A1 (de) * 1974-05-31 1975-12-18 Bennes Marrel Saint Etienne Fa Hydraulische steuervorrichtung
US4122864A (en) * 1974-05-31 1978-10-31 Bennes Marrel Selective and proportional hydraulic remote control device, in particular for handling and public work gears
US5103866A (en) * 1991-02-22 1992-04-14 Foster Raymond K Poppet valve and valve assemblies utilizing same
US20150308325A1 (en) * 2012-12-05 2015-10-29 Hydac Fluidtechnik Gmbh Device for controlling the operation of a ventilator, which can be driven by a hydraulic motor, of a cooling device
JP2015536429A (ja) * 2012-12-05 2015-12-21 ハイダック フルイドテヒニク ゲゼルシャフト ミット ベシュレンクテル ハフツング 流体圧モータによって駆動可能な、冷却装置のベンチレータの駆動を制御する装置
CN110513511A (zh) * 2019-08-28 2019-11-29 奥瑞拓能源科技股份有限公司 一种配气装置
CN110513511B (zh) * 2019-08-28 2024-04-30 奥瑞拓能源科技股份有限公司 一种配气装置
CN112833218A (zh) * 2021-02-18 2021-05-25 涌镇液压机械（上海）有限公司 双路负载比例换向阀
CN112833218B (zh) * 2021-02-18 2024-05-24 涌镇液压机械（上海）有限公司 双路负载比例换向阀

Also Published As

Publication number Publication date
GB1214713A (en) 1970-12-02
SE342671B (enrdf_load_stackoverflow) 1972-02-14
BE713559A (enrdf_load_stackoverflow) 1968-08-16
DE1600876B2 (de) 1972-05-10
JPS505410B1 (enrdf_load_stackoverflow) 1975-03-04
FR1573195A (enrdf_load_stackoverflow) 1969-07-04
DE1600876A1 (de) 1970-05-06

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