US3756278A - Control slide valve for a hydraulic servo motor - Google Patents

Control slide valve for a hydraulic servo motor Download PDF

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Publication number
US3756278A
US3756278A US00234562A US3756278DA US3756278A US 3756278 A US3756278 A US 3756278A US 00234562 A US00234562 A US 00234562A US 3756278D A US3756278D A US 3756278DA US 3756278 A US3756278 A US 3756278A
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US
United States
Prior art keywords
slide member
valve
slide
pressure
passages
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
US00234562A
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English (en)
Inventor
K Olav
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.)
AM Liaaen AS
Original Assignee
AM Liaaen AS
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 AM Liaaen AS filed Critical AM Liaaen AS
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Publication of US3756278A publication Critical patent/US3756278A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
    • 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
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • 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
    • F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
    • F15B9/16—Systems essentially having two or more interacting servomotors, e.g. multi-stage
    • 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
    • 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
    • Y10T137/86606—Common to plural valve motor chambers

Definitions

  • the present invention relates to a control slide valve for a hydraulic servo motor, of the type in which a brake is associated with the slide member for the purpose of securing an accurate setting and arrest of the slide member by use of a negligible force, through the provision, at either end of the slide member of a pressure chamber defined by a cylinder formed in the valve casing and provided with an inlet for a pressure fluid, the pressure of which is lower than the operational pressure of the control slide valve.
  • the axial passages or bores, through which the individual pressure chambers may be set in communication with open air for the release of the pressure in the chamber in question, may be provided inthe slide member extensions proper and open out in the end face of the slide member extension in question, while the member which is to be moved by external influence is provided with a collar having a boundary surface extending parallelly to the said end face, the closing of the passages or bores being effected by the engagement of the appropriate collar to the end surface of the slide memberextension.
  • the passages in the form of axially extending cross sectional area restrictions of restricted length in the member which is to be moved by external influence, the end of each restriction situated most closely to the end face of the slidemember extension in question being closed by a collar on the movable member and of a diameter corresponding to that of the axial bore in the slide valve housing in which the member is movable, whereby a by far greater movability is obtained for the member which is to be influenced from the outside.
  • a pressure chamber is provided at each end of the slide member, in order that the slide member may be operable by movement in both directions.
  • the members which are to be influenced from the outside for the adjustment of the pressure in the individual chambers, each through itsown set of bores or passages, are connected to a common rod which extends axially through the slide member and may be moved axially relatively to the same, to the effect that the pressures in both chambers are influenced simultaneously.
  • FIG. 1 is an axial longitudinal sectional view through a slide valve which at each end is provided with an arrangement according to the invention.
  • FIG. 2 is a corresponding sectional view, showing a second embodiment of the arrangement according to the invention.
  • FIG. 3 is a sectional view along the line Ill-Ill in FIG. 2.
  • 1 is a cylindrical housing, accomodating a slide member 2 which is adapted to be moved axially relatively to the housing 1.
  • the housing 1 is, in conventional manner, provided with an inlet duct3 for a pressure medium P, and has, together with the slide member 2, conventional annular grooves serving at will and in dependence of the position of the slide member 2 to feed the pressure medium to the two sides A and B, respectively of the piston d of a hydraulic servo motor 5, and to a sump through outlets R.
  • the slide member 2 is so shaped relatively to the housing 1 that in the neutral position of the slide member 2 two cylinder spaces 6 are formed between each end face 7 of the slide member and the corresponding face 8 of a closing member 10 in the housing 1.
  • the slide member 2 is also provided with axial extensions '9 which are extending through the end members 10 in the housing 1, longitudinal passages 11 being provided in the extensions 9, serving to bring the spaces 6 in communication with the open air.
  • each of the spaces 6 is in continuous communication with the pressure source P through a throttle valve 13, to the effect that when the slide member 2 is in the position shown in FIGS. 1 and 2, the neutral position, both spaces are under the same pressure, which is lower than the pressure P.
  • An axially extending rod 14 is carried freely through the slide member 2 and is, outside of each of the slide member extensions 9, provided with a collar 15 and, at one end operatively coupled to a motion mechanism 16, to the effect that the rod 14 with its collars 15 may be moved in a desired manner axially relatively to the slide member 2.
  • the mechanism 16 and the hydraulic servo motor 4,5 are shown in FIG. 1 only, but corresponding systems are presumed to. be associated with the slide valve shown in FIG. 2.
  • the passages 11 are in the form of axial bores in the extensions 9, each opening out in the end faces 12 of the extensions.
  • the diameter of the collars l5 and the distance along the rod 14 between the collars are so related that when the slide member 2 is in the neutral middle position which is shown in the drawing, there is a slot between each of the end faces 12 and the corresponding collar 115, through which each of the spaces 6 is in free communi-. cation with open air.
  • the slide member extensions 9 are formed by means of inserted sleeves 91, and the axial passages are in the form of longitudinally extending flat, milled off portions of the surface of the rod 14, so that passages 111 are formed between the milled off faces of the rod and the inner surface of each of the sleeves 91.
  • the passages 1 l1 communicate with the respective spaces 6 through radial bores 92 in the sleeves 91.
  • circumferential grooves 112 are cut out at each end of the passages 111, which grooves are defined by collars 151 and 152 on the rod 14 at the sides opposite to the openings of the passages 111.
  • the distance along the rod 14 between the outer collars 151 is equal to the length of the slide member 2 with the extensions 9 of the same, to the effect that when the rod 14 is in the neutral middle position, as shown in FIG. 2, the side of each of the collars 151 which is facing the circumferential grooves 112, is on line with the free end face 12 of the corresponding slide member extension 9, to the effect that the communications between the spaces 6 and the open air are equally throttled by means of the collars lsl.
  • the inner collars 152 serve both as terminations to the passages 111 and as guides for the rod 14 along the inner surface of the sleeve 91.
  • the collars 151 are also made with the same diameter as the inner surface of the sleeve 91.
  • the rod 14 has, in this case, a by far greater motion facility than the rod 14 of the embodiment of FIG. 1, inwhich embodiment the length of stroke of the rod is restricted by the difference between the length of the slide member 2 with its extensions and the axial distance between the collars 15.
  • the rod may continue its axial motion when the face 7 at one end of the slide member 2 has abutted against the corresponding face 8 of the closing member 10, to the effect that a greater freedom in the construction of the return mechanism 16 is achieved I claim:

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Servomotors (AREA)
  • Actuator (AREA)
US00234562A 1971-03-16 1972-03-14 Control slide valve for a hydraulic servo motor Expired - Lifetime US3756278A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO991/71A NO133082C (enrdf_load_stackoverflow) 1971-03-16 1971-03-16

Publications (1)

Publication Number Publication Date
US3756278A true US3756278A (en) 1973-09-04

Family

ID=19877900

Family Applications (1)

Application Number Title Priority Date Filing Date
US00234562A Expired - Lifetime US3756278A (en) 1971-03-16 1972-03-14 Control slide valve for a hydraulic servo motor

Country Status (7)

Country Link
US (1) US3756278A (enrdf_load_stackoverflow)
DE (1) DE2212149A1 (enrdf_load_stackoverflow)
FR (1) FR2129647A5 (enrdf_load_stackoverflow)
GB (1) GB1332617A (enrdf_load_stackoverflow)
NL (1) NL7203428A (enrdf_load_stackoverflow)
NO (1) NO133082C (enrdf_load_stackoverflow)
PL (1) PL71096B1 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980001A (en) * 1973-08-08 1976-09-14 Cyphelly Ivan J Reversing valve operated by a pilot valve
US4450865A (en) * 1980-07-28 1984-05-29 Bennes Marrel Hydraulic power slide valve, especially designed for public work equipment
US4987927A (en) * 1988-12-27 1991-01-29 Sterer Engineering And Manufacturing Company Direct-drive valve

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2456765A1 (de) * 1974-11-30 1976-06-10 Elmeg Servoventil
CN105314123A (zh) * 2014-06-20 2016-02-10 徐延明 一种航母弹射器的控制阀

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922400A (en) * 1956-04-13 1960-01-26 Hughes Tool Co Hydraulic servomechanism with feedback-energy-dissipating control valve
US2981288A (en) * 1959-07-15 1961-04-25 Hough Co Frank Hydraulic control valves
US3013539A (en) * 1959-06-23 1961-12-19 Shell Oil Co Quick-acting reversing valve with speed compensation
US3027880A (en) * 1959-06-22 1962-04-03 Shell Oil Co Quick-acting reversing valve with pressure compensation
US3114394A (en) * 1961-12-28 1963-12-17 Ibm Fluid apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922400A (en) * 1956-04-13 1960-01-26 Hughes Tool Co Hydraulic servomechanism with feedback-energy-dissipating control valve
US3027880A (en) * 1959-06-22 1962-04-03 Shell Oil Co Quick-acting reversing valve with pressure compensation
US3013539A (en) * 1959-06-23 1961-12-19 Shell Oil Co Quick-acting reversing valve with speed compensation
US2981288A (en) * 1959-07-15 1961-04-25 Hough Co Frank Hydraulic control valves
US3114394A (en) * 1961-12-28 1963-12-17 Ibm Fluid apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980001A (en) * 1973-08-08 1976-09-14 Cyphelly Ivan J Reversing valve operated by a pilot valve
US4450865A (en) * 1980-07-28 1984-05-29 Bennes Marrel Hydraulic power slide valve, especially designed for public work equipment
US4987927A (en) * 1988-12-27 1991-01-29 Sterer Engineering And Manufacturing Company Direct-drive valve

Also Published As

Publication number Publication date
FR2129647A5 (enrdf_load_stackoverflow) 1972-10-27
NO133082C (enrdf_load_stackoverflow) 1976-03-03
DE2212149A1 (de) 1972-09-21
NO133082B (enrdf_load_stackoverflow) 1975-11-24
GB1332617A (en) 1973-10-03
NL7203428A (enrdf_load_stackoverflow) 1972-09-19
PL71096B1 (enrdf_load_stackoverflow) 1974-04-30

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