GB1381245A - Hydraulic velocity and acceleration control system - Google Patents

Hydraulic velocity and acceleration control system

Info

Publication number
GB1381245A
GB1381245A GB958073A GB958073A GB1381245A GB 1381245 A GB1381245 A GB 1381245A GB 958073 A GB958073 A GB 958073A GB 958073 A GB958073 A GB 958073A GB 1381245 A GB1381245 A GB 1381245A
Authority
GB
United Kingdom
Prior art keywords
rate
valve
flow
conduit
source
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
Application number
GB958073A
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.)
Lockheed Corp
Original Assignee
Sanders Associates Inc
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 Sanders Associates Inc filed Critical Sanders Associates Inc
Publication of GB1381245A publication Critical patent/GB1381245A/en
Expired legal-status Critical Current

Links

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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/32—Controlling equipment
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3144—Directional control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/35—Directional control combined with flow control
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
    • F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/75—Control of speed of the output 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/755—Control of acceleration or deceleration of the output member

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Servomotors (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

1381245 Pressure casting machines SANDERS ASSOCIATES Inc 27 Feb 1973 [2 March 1972] 9580/73 Heading B3F [Also in Division F1] In a circuit, Fig. 2, for controlling the rate of flow of fluid to a load 32 and the rate of change of flow, a main valve 21, of the type in which the flow to the load is proportional to the rate of flow of pilot fluid is controlled by an auxiliary valve 62 and a restrictor 64 which determines the maximum rate of flow of pilot fluid to the valve 21. A restrictor 69 determines the rate at which the valve 62 opens and thus the rate of change of flow of pilot fluid. In operation, the spool of valve 21 is initially displaced to the right of the position shown by pressure from a source 38 acting in a space 22. End space 23 is connected to reservoir through a throttle 71. This connects source 38 through conduit 37, valve 21 and conduit 33 to the rod end of cylinder 32 to retract the plunger. To move the plunger forwards a solenoid 58 is energized to connect a higher pressure source 51 to conduit 55. This pressure begins to open the valve 62 at a rate controlled by the adjustable throttle 69. This controls the rate at which pilot flow to the valve 21 increases and thus the rate of increase of flow to the load 32. After the piston has reached a steady speed, determined by the throttle 64, further acceleration may be produced by energizing a solenoid 57 and de-energizing 58. This connects the source 51 to a conduit 54, valve 82 and throttles 84, 89 which act as previously described. The cylinder 32 may be the shot cylinder of a die-casting machine.
GB958073A 1972-03-02 1973-02-27 Hydraulic velocity and acceleration control system Expired GB1381245A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US23121272A 1972-03-02 1972-03-02

Publications (1)

Publication Number Publication Date
GB1381245A true GB1381245A (en) 1975-01-22

Family

ID=22868219

Family Applications (1)

Application Number Title Priority Date Filing Date
GB958073A Expired GB1381245A (en) 1972-03-02 1973-02-27 Hydraulic velocity and acceleration control system

Country Status (6)

Country Link
JP (1) JPS5312034B2 (en)
CH (1) CH559858A5 (en)
DE (1) DE2305593A1 (en)
FR (1) FR2174563A5 (en)
GB (1) GB1381245A (en)
SE (1) SE376788B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4293040A (en) * 1979-08-06 1981-10-06 Allis-Chalmers Corporation Hydraulic draft load sensing system including quill shaft bendable in response to draft loads
US4350209A (en) * 1979-08-06 1982-09-21 Allis-Chalmers Corporation Hydraulic draft control valve
EP1040883A1 (en) * 1999-03-31 2000-10-04 Mazda Motor Corporation Light metal forging material manufacturing method and forged member manufacturing method using the material

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4199942A (en) * 1978-09-28 1980-04-29 Eaton Corporation Load sensing control for hydraulic system
FI100677B (en) 1996-09-13 1998-01-30 Multilift Oy Method for controlling the speed of movement of hydraulically driven machine, drive system of hydraulically driven machine and control device
DE102017002818A1 (en) * 2017-03-23 2018-09-27 Cosateq Gmbh Method for operating a die-cast press with layer control and die-casting press for carrying out the method
CN110345116B (en) * 2018-04-02 2021-11-05 僧全松 Manual or electric digital hydraulic rotary servo valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4293040A (en) * 1979-08-06 1981-10-06 Allis-Chalmers Corporation Hydraulic draft load sensing system including quill shaft bendable in response to draft loads
US4350209A (en) * 1979-08-06 1982-09-21 Allis-Chalmers Corporation Hydraulic draft control valve
EP1040883A1 (en) * 1999-03-31 2000-10-04 Mazda Motor Corporation Light metal forging material manufacturing method and forged member manufacturing method using the material

Also Published As

Publication number Publication date
SE376788B (en) 1975-06-09
JPS48100578A (en) 1973-12-19
CH559858A5 (en) 1975-03-14
FR2174563A5 (en) 1973-10-12
DE2305593A1 (en) 1973-09-13
JPS5312034B2 (en) 1978-04-26

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee