GB1483230A - Multiple pump control system - Google Patents

Multiple pump control system

Info

Publication number
GB1483230A
GB1483230A GB42568/74A GB4256874A GB1483230A GB 1483230 A GB1483230 A GB 1483230A GB 42568/74 A GB42568/74 A GB 42568/74A GB 4256874 A GB4256874 A GB 4256874A GB 1483230 A GB1483230 A GB 1483230A
Authority
GB
United Kingdom
Prior art keywords
valve
pressure
pump
spool
port
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
GB42568/74A
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.)
Sargent Industries Inc
Original Assignee
Sargent Industries 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 Sargent Industries Inc filed Critical Sargent Industries Inc
Publication of GB1483230A publication Critical patent/GB1483230A/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
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • 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
    • F15B2211/20576—Systems with pumps with multiple pumps
    • 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
    • F15B2211/275—Control of the prime mover, e.g. hydraulic 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41563—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a return line
    • 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
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/428—Flow 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
    • F15B2211/40—Flow control
    • F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow to the return line
    • 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
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6055—Load sensing circuits having valve means between output member and the load sensing circuit using pressure relief 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/75—Control of speed of the output member

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

1483230 Rotary positive-displacement fluidmachines SARGENT INDUSTRIES Inc 1 Oct 1974 [1 Oct 1973] 42568/74 Heading F1F In a hydraulic system comprising two pumps P 1 , P 2 , e.g. gear pumps, driven by a variable speed engine of a vehicle and supplying liquid to an auxiliary mechanism 23 on the vehicle, e.g. a refuse packer, a control valve 21 responsive to the pump output pressure and flow acts to by-pass the output from one of the pumps when a predetermined output pressure or flow is exceeded, thereby permitting quieter operation of the vehicle. Valve 21 comprises an adjustable spring-loaded spool 26 with a passage 27 between ports 28 and 29 through which the output of pump P 1 passes, port 28 being dimensioned such that when the throughflow exceeds a predetermined level, the pressure differential between the valve chambers respectively communicating with ports 28, 29 causes movement of spool 26 to the right from the position shown, in which pump P 2 delivers via passages 19, 37, check-valve 38 and port 22 to mechanism 23, to a position, Fig. 3 (not shown), in which valve land 35 has moved to permit communication between port 19 and by-pass port 40, tapered grooves 60 in land 35 controlling the flow. For pressure control of spool 26, pressure from pump P 1 acts via passages 41, 49, 47, chamber 46, restricted passage 50, chamber 45, passage 52 and chamber 51 on a valve 54, which opens against adjustable spring 55 when the pressure reaches the predetermined level, and the pressure differential set up across piston 44 moves piston 44 and spool 26 to the right.
GB42568/74A 1973-10-01 1974-10-01 Multiple pump control system Expired GB1483230A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US40229273A 1973-10-01 1973-10-01

Publications (1)

Publication Number Publication Date
GB1483230A true GB1483230A (en) 1977-08-17

Family

ID=23591322

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42568/74A Expired GB1483230A (en) 1973-10-01 1974-10-01 Multiple pump control system

Country Status (9)

Country Link
JP (1) JPS50116877A (en)
AU (1) AU7384374A (en)
BR (1) BR7408099D0 (en)
DE (1) DE2445979A1 (en)
FR (1) FR2246759A1 (en)
GB (1) GB1483230A (en)
IT (1) IT1032092B (en)
SE (1) SE7412270L (en)
ZA (1) ZA7406245D (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1566385A (en) * 1977-07-11 1980-04-30 Caterpillar Tractor Co Dual pump flow combining system
DE3001570C2 (en) * 1980-01-17 1983-03-24 Alfred Kärcher GmbH & Co, 7057 Winnenden Device for volume regulation for the amount of liquid dispensed by a multi-piston high-pressure pump of a high-pressure cleaner
IT1193521B (en) * 1980-03-03 1988-07-08 Same Spa HYDRAULIC CIRCUIT OF A TRACTOR FOR THE CONTROL OF ACTUATORS

Also Published As

Publication number Publication date
DE2445979A1 (en) 1975-04-10
JPS50116877A (en) 1975-09-12
AU7384374A (en) 1976-04-08
ZA7406245D (en) 1975-11-26
BR7408099D0 (en) 1975-09-16
FR2246759A1 (en) 1975-05-02
IT1032092B (en) 1979-05-30
SE7412270L (en) 1975-04-02

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed