US3324871A - Jet pipe regulator with null position adjustment - Google Patents

Jet pipe regulator with null position adjustment Download PDF

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Publication number
US3324871A
US3324871A US445624A US44562465A US3324871A US 3324871 A US3324871 A US 3324871A US 445624 A US445624 A US 445624A US 44562465 A US44562465 A US 44562465A US 3324871 A US3324871 A US 3324871A
Authority
US
United States
Prior art keywords
receiver
jet pipe
ports
nozzle
spool
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
US445624A
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English (en)
Inventor
Jr Edward H Farnan
Robert E Kay
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.)
Vickers Inc
Original Assignee
Sperry Rand Corp
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 Sperry Rand Corp filed Critical Sperry Rand Corp
Priority to US445624A priority Critical patent/US3324871A/en
Priority to DE1966S0103013 priority patent/DE1523650B1/de
Priority to FR56550A priority patent/FR1473791A/fr
Priority to GB15003/66A priority patent/GB1115885A/en
Application granted granted Critical
Publication of US3324871A publication Critical patent/US3324871A/en
Assigned to SPERRY CORPORATION reassignment SPERRY CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SPERRY RAND CORPORATION
Anticipated expiration legal-status Critical
Assigned to VICKERS, INCORPORATED reassignment VICKERS, INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SPERRY CORPORATION A DE CORP.
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
    • F15B13/043—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 electrically-controlled pilot valves
    • F15B13/0436—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 electrically-controlled pilot valves the pilot valves being of the steerable jet type
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1225—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston with a plurality of pistons
    • 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
    • Y10T137/2278—Pressure modulating relays or followers
    • Y10T137/2322—Jet control type
    • 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
    • Y10T137/8659—Variable orifice-type modulator
    • Y10T137/86598—Opposed orifices; interposed modulator
    • 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
    • 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
    • Y10T137/86614—Electric

Definitions

  • This invention relates to power transmissions and is particularly applicable to those of the type comprising two or more fluid pressure energy translating devices, one of which may function as a pump and another as a fluid motor.
  • the invention is more particularly concerned with electro-hydraulic jet pipe control systems.
  • the first stage of the system comprises a jet pipe having a nozzle at one end through which a high velocity fluid jet issues toward two closely spaced receiver ports leading or connected to output ports of the first stage.
  • the output ports of the first stage may be directly connected to an output member such as an actuating cylinder or to a second stage fluid pressure actuated directional control valve.
  • the jet pipe nozzle is acurately positioned or centered over the two receiver ports, no differential pressure is created at the output ports of the first stage when the jet pipe is in what is known as the null position as the two receiver ports are adapted in the null position of the jet pipe to receive an equal amount of fluid so as to create a pressure balance.
  • the jet pipe may be pivoted, swung, or flexed by a torqueor force motor in response to signals communicated thereto for shifting the jet pipe, thus shifting the nozzle more or less over one of the receiver ports in order to create a differential of pressure at the output ports of the first stage.
  • adjustable stops are provided to limit movement of the jet pipe in opposite directions for preventing overshifting of the jet pipe and thus loss of communication of the nozzle with the receiver ports.
  • FIGURE 1 is a sectional View of an electro-hydraulic jet pipe control system embodying a preferred form of the present invention.
  • FIGURE 2 is a fragmentary sectional view on an enlarged scale of a portion of the jet pipe control system shown in FIGURE 1.
  • FIGURE 3 is a top view of the receiver spool shown in FIGURE 2.
  • FIGURE 4 is a sectional view of the receiver spool taken on line 44 of FIGURE 3.
  • an electro-hydraulic et pipe control system comprising a housing 12 within which there is mounted a first stage force motor 14 for operating a jet pipe 16 having a nozzle 18 at one end thereof, which is accurately positioned in the null position shown over two jet receiver ports 20 and 22 of a receiver spool 24.
  • a second stage directional control valve spool 26 operated by fluid pressure differential controlled by the jet pipe.
  • the second stage may comprise a directly actuated output member, such as a motor of the actuating cylinder type.
  • FIGURES 2 and 3 the receiver spool and jet nozzle end of the jet pipe are shown in FIGURES 2 and 3 as if the complete system shown in FIGURE 1 has been rotated counterclockwise.
  • the jet pipe 16 is provided with an enlarged externally threaded portion 28 at the end thereof opposite to the nozzle Which serves to anchor the pipe in one end of a longitudinal bore 30 which extends completely through the housing.
  • the force motor 14 comprises a coil 32 surrounding a magnet 34, all of which is protected by a cover 35 fastened to the housing 12, the coil 32 being clamped at 36 to the jet pipe near the nozzle end thereof for flexing the pipe in the bore 30 in response to signals imposed through wiring 38 connected to the force motor 14.
  • the output member of the second stage part of the system comprising control valve spool 26 is shiftably mounted within a longitudinal bore 40 of the housing 14). Bore 40 is provided with an annular pressure supply port 42 located between two operating or motor ports 44 and 46 and two return or tank ports 48 and 59, respectively, equally spaced on opposite sides of the two operating or motor ports 44 and 46.
  • the control valve spool 26 is provided with centrally located spaced apart land members 52 and 54 and extreme end lands 56 and 58, respectively, having balanced pressure effective end surface areas 57 and 59.
  • the valve spool 26 is biased to the position shown closing off communication between all ports by means of spring members 61 and 63, respectively, mounted in fluid pressure end chambers 65 and 67.
  • pressure in the chambers 65 and 67 created by flexing of the jet pipe 16 and acting on the balanced spool end areas 57 and 59 is adapted to shift the valve spool 26 to conduct a pressure fluid supply source connected to pressure port 42 to one of the motor ports 44 or 46 while connecting the remaining motor port to one of the tank ports.
  • the pressure port 42 is connected to motor port 44 and motor port 46 is connected to the tank port 50; and when the valve spool 26 is shifted rightwardly, pressure port 42 is connected to motor port 46 and the motor port 44 is connected to the tank port 48.
  • the same pressure fluid supply source connected to the pressure port 42 of the second stage control valve 26 is also adapted to be connected through a pressure reducing valve, not shown, to a plurality of transverse ports 60 at the enlarged end of the first stage jet pipe, which ports are directly connected to the hollow portion of the pipe, indicated by the numeral 61, terminating in the jet nozzle 18.
  • the receiver spool member 24 is mounted in a bore 62 of the housing which extends from that side of the housing in which the force motor is mounted. Bore 62 is perpendicular to and intersects both longitudinal bore 30, in which the jet pipe is mounted, and chamber 65 at one end of bore 40, in which control valve spool 26 is mounted. A plug 64 maintained by a snap ring 66 closes the bore 62.
  • the receiver spool 24 is constructed with a centrally located cutaway or recessed portion 27 and on two opposing side walls of which are formed ledges or shelves 29 on which is fixedly located a thin plate member 68 having a guide slot 70 for the jet pipe 16.
  • the slot 70 is accurately positioned over the receiver ports and 22 which open to a flat surface 31 in the bottom of the recessed portion 27. End wall surfaces 72 and 74 of the slot 70 limit the movement of the jet pipe in opposite directions so that the jet pipe nozzle 18 is never out of communication with either of the receiver ports 22 or 20; and thus, when the jet pipe is flexed, the jet stream will always be directed into one or the other of the receiver ports.
  • the right receiver port 20 extends angularly into the spool in a direction opposite to that of port 22 and intersects a cross passage 82 which extends axially completely through the spool to a chamber 84 at the left end of the spool in which a receiver spool left end pressure surface area 86, equal in area to that of the right end surface 80, is exposed.
  • the chambers 78 and 84 serve as output ports of the first stage to which the output member of the second stage is connected.
  • a common return port for the two stages of the system adapted to be connected to a reservoir or tank is indicated in FIGURE 1 by the numeral 95.
  • the nozzle end of the jet pipe 16, at assembly of the control system, is inserted through the slot 70 of the receiver spool 24, the longitudinal axis of the guide slot 70 being in the same plane as the common centerline of the receiver ports and the slot width being sufficient to allow free movement of the jet pipe nozzle along the common axis of the receiver ports.
  • a differential of pressure on pressure surface areas 80 and 86 of the receiver spool 24 is ineffective to shift the spool as the spool 24 is locked in the position shown by a locking screw 88.
  • the locking screw 88 is threaded into the bore and has a stub end 90 which is fitted into another 4 slot 92 into the receiver spool 24 opposite the receiver ports 20 and 22.
  • the stub end 90 is located in the slot 92 and contacts a surface 93 of the receiver spool for locking the receiver spool and which also prevents the receiver spool from rotating.
  • the jet pipe 16 which extends through the receiver guide slot 70, issues a high velocity fluid jet through the nozzle 18 toward the receiver ports 20 and 22.
  • the receiver ports are adapted to receive the jet stream and convert its kinetic energy into a differential static pressure.
  • the receiver spool After assembly of the control system but before operation or in field service, the receiver spool will be self-adjusting for accurately positioning or centering the jet nozzle 18 over the two receiver ports 20 and 22 merely by loosening the locking screw 88 to permit slight axial movement of the receiver spool 24. With the locking screw 88 loosened, a source of pressure fluid supply connected to the jet pipe ports 60, and with no input signal being applied to the force motor 14, so as to maintain the jet pipe in the bore 30 in the null position shown, any pressure differential at opposite ends of the receiver spool caused by one receiver port getting more fluid than the other will shift the receiver spool unitil the receiver ports are accurately centered about the jet stream and nozzle 18.
  • the differential pressure in chambers 78 and 84 at opposite ends of the receiver spool bore 62 acting on receiver spool end surface areas and 86 causes the receiver spool 24 to move or shift until a pressure balance exists between both receiver ports and their respective correlated chambers to which they are connected.
  • This pressure balance will only be created when the nozzle 18 is accurately centered or positioned over the receiver ports.
  • This balance is reached almost immediately, and when achieved, the locking screw 88 is tightened to impose the stub end on the receiver spool surface 93, thus accurately fixing or locking the receiver spool position for normal operation of the control mechanism.
  • the receiver guide slot 70 serves to keep the jet pipe (and jet stream) on the common axis of the receiver ports and to limit its travel to the position of maximum pressure recovery. No gauges, special tools or instruments, or disassembly of the system are required to provide proper centering of the receiver ports relative to the nozzle.
  • the jet pipe Upon operation of the force motor and with the receiver spool in the locked position, .the jet pipe is flexed and the differential pressure caused by directing the jet stream into one or the other of the receiver ports is used to control the movement of the directional valve spool 26 or may be used to directly actuate a second stage output member other than control valve spool 26.
  • a hydraulic cont-r01 system having a jet pipe with a nozzle at one end thereof and including means for connecting pressure fluid thereto and means for shifting the pipe in opposite directions from a stationary null position,
  • a receiver port member having a surface with two receiver ports opening thereto, said ports being independently connected to oppositely disposed end chambers in which are respectively exposed pressure elfective opposed end surfaces of the receiver port member,
  • said receiver port member with the jet pipe in the null position and pressure fluid connected to the jet pipe, being shiftable in opposite directions in response to a differential of pressure on the end surfaces of said member until the receiver ports are centered relative to the jet pipe nozzle at which time a pressure balance exists at the opposed ends of the member,
  • locking means comprises a locking screw, an end surface of which is adapted to engage the receiver port member.
  • said slot including opposed wall surfaces limiting movement of the jet pipe from the null position and preventing loss of communication of the nozzle with the receiver ports.
  • receiver port member is provided with a jet pipe guide slot through which the nozzle end of the jet pipe extends and which is formed with oppositely disposed fixed end wall surfaces limiting movement of the jet pipe in opposite directions from the null position and preventing loss of communication of the nozzle with the jet receiver ports.
  • the locking member comprises a screw member engaging a surface of the receiver member on the side of the receiver port member opposite to the receiver port surface and also serving to prevent rotation of the receiver member while being adjusted to the centered position.
  • An electro-hydraulic jet pipe control system comprising a housing having a first bore perpendicular to and intersecting a second bore
  • a jet pipe in the first lbore having a nozzle at one end and adapted to be connected to a pressure fluid supply source
  • a receiver port member having opposed end surfaces shiftably mounted in the second bore and forming chambers in said bore at opposite ends of the member adapted for connection to an output member
  • said receiver port member having a surface between the end surfaces opposed to and spaced from the nozzle and with two closely spaced receiver ports opening thereto,
  • said receiver ports being independently cross-connected to the end chambers of the receiver member.
  • An electro-hydraulic jet pipe control system as in claim 9 wherein the receiver port member is provided with a jet pipe guide slot spaced from and accurately located over the receiver ports, the nozzle end of the jet pipe extending through said jet pipe guide slot, and two opposed end surfaces of the jet pipe guide slot limiting movement of the jet pipe in opposite directions from the null position to prevent loss of communication of the nozzle with the receiver ports, the longitudinal axis of the jet pipe guide slot is in the same plane as the common centerline of the receiver port openings, and the jet pipe guide slot width is sufficient to allow free movement of the nozzle end of the jet pipe along the common axis of the receiver ports.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Jet Pumps And Other Pumps (AREA)
US445624A 1965-04-05 1965-04-05 Jet pipe regulator with null position adjustment Expired - Lifetime US3324871A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US445624A US3324871A (en) 1965-04-05 1965-04-05 Jet pipe regulator with null position adjustment
DE1966S0103013 DE1523650B1 (de) 1965-04-05 1966-04-02 Hydraulische Steuereinrichtung mit einem Strahlrohr
FR56550A FR1473791A (fr) 1965-04-05 1966-04-05 Dispositif de commande hydraulique
GB15003/66A GB1115885A (en) 1965-04-05 1966-04-05 Improvements in hydraulic control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US445624A US3324871A (en) 1965-04-05 1965-04-05 Jet pipe regulator with null position adjustment

Publications (1)

Publication Number Publication Date
US3324871A true US3324871A (en) 1967-06-13

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ID=23769617

Family Applications (1)

Application Number Title Priority Date Filing Date
US445624A Expired - Lifetime US3324871A (en) 1965-04-05 1965-04-05 Jet pipe regulator with null position adjustment

Country Status (4)

Country Link
US (1) US3324871A (de)
DE (1) DE1523650B1 (de)
FR (1) FR1473791A (de)
GB (1) GB1115885A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3584638A (en) * 1969-06-13 1971-06-15 Bell Aerospace Corp Adjustable receiver port construction for jet pipe servovalve
US3621880A (en) * 1969-06-13 1971-11-23 Bell Aerospace Corp Jet pipe servo valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE475741C (de) * 1928-10-30 1929-05-01 Otto & Co Gmbh Dr C Gasdruckregler mit einem Strahlrohr
US2601207A (en) * 1951-02-15 1952-06-17 Askania Regulator Co Fluid regulator
US3205782A (en) * 1962-05-28 1965-09-14 Sperry Rand Corp Power transmission

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2936783A (en) * 1957-03-11 1960-05-17 Sperry Rand Corp Electro-hydraulic servo control valve
US2884907A (en) * 1957-08-30 1959-05-05 Raymond Atchley Inc Servo-mechanism
US2964018A (en) * 1957-12-27 1960-12-13 Bendix Corp Electro-hydraulic servo valve
DE1166573B (de) * 1959-03-12 1964-03-26 Normalair Ltd Steuerventil
NL121227C (de) * 1959-06-04 1900-01-01
US3081787A (en) * 1961-07-13 1963-03-19 Pneumo Dynamics Corp Hydraulic control valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE475741C (de) * 1928-10-30 1929-05-01 Otto & Co Gmbh Dr C Gasdruckregler mit einem Strahlrohr
US2601207A (en) * 1951-02-15 1952-06-17 Askania Regulator Co Fluid regulator
US3205782A (en) * 1962-05-28 1965-09-14 Sperry Rand Corp Power transmission

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3584638A (en) * 1969-06-13 1971-06-15 Bell Aerospace Corp Adjustable receiver port construction for jet pipe servovalve
US3621880A (en) * 1969-06-13 1971-11-23 Bell Aerospace Corp Jet pipe servo valve

Also Published As

Publication number Publication date
GB1115885A (en) 1968-05-29
FR1473791A (fr) 1967-03-17
DE1523650B1 (de) 1971-01-14

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SPERRY CORPORATION

Free format text: CHANGE OF NAME;ASSIGNOR:SPERRY RAND CORPORATION;REEL/FRAME:003794/0122

Effective date: 19790824

AS Assignment

Owner name: VICKERS, INCORPORATED TROY, MI A DE CORP

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE NOVEMBER 2, 1983;ASSIGNOR:SPERRY CORPORATION A DE CORP.;REEL/FRAME:004337/0889

Effective date: 19831102

Owner name: VICKERS, INCORPORATED,MICHIGAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SPERRY CORPORATION A DE CORP.;REEL/FRAME:004337/0889

Effective date: 19831102