GB1474650A - Hydraulic control system - Google Patents

Hydraulic control system

Info

Publication number
GB1474650A
GB1474650A GB3058575A GB3058575A GB1474650A GB 1474650 A GB1474650 A GB 1474650A GB 3058575 A GB3058575 A GB 3058575A GB 3058575 A GB3058575 A GB 3058575A GB 1474650 A GB1474650 A GB 1474650A
Authority
GB
United Kingdom
Prior art keywords
pump
line
motor
fluid
flow
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
GB3058575A
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.)
SPX Corp
Original Assignee
General Signal 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
Priority claimed from US05/490,455 external-priority patent/US3935706A/en
Priority claimed from US05/490,629 external-priority patent/US3935707A/en
Application filed by General Signal Corp filed Critical General Signal Corp
Publication of GB1474650A publication Critical patent/GB1474650A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/002—Hydraulic systems to change the pump delivery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2201/00—Pump parameters
    • F04B2201/12—Parameters of driving or driven means
    • F04B2201/1204—Position of a rotating inclined plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/08—Pressure difference over a throttle

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Operation Control Of Excavators (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
  • Refuse-Collection Vehicles (AREA)

Abstract

1474650 Hydraulic control circuits GENERAL SIGNAL CORP 22 July 1975 [22 July 1974 (2)] 30585/75 Heading F1P [Also in Division G3] A hydraulic circuit includes a pump 12 driven by a motor 44, actuators 34, 35 and a control circuit 50 connected to both the pump and the motor for permitting the delivery of power to the actuators when the motor is operating up to a predetermined speed, and for stopping delivery of power when the motor is running above the predetermined speed. As described, the circuit is used in a refuse vehicle in which the actuators compress refuse. When the motor 44 is idling, the pump 12 delivers fluid through a restrictor 18, thus, the difference in pressure between lines 20, 22 is 200 p.s.i. A speed control pump 52 is supplying fluid at a low flow rate through a line 56 and a throttle 58 and at this rate of flow no pressure drop occurs across the throttle 58. The fluid then passes to a reservoir 25 through a check-valve 63 and solenoid valve 160. When the motor 44 speeds up, the pump 12 delivers fluid at a greater rate of flow. The pressure drop across the restrictor 18 increases and this is sensed by a flow control valve 100 via signal lines 20, 22. This causes control plunger 107 to move towards the spring chamber end 104 until a land 108 allows fluid to pass from a line 66 to destroke line 88. Reservoir line 92 is restricted by land 110 and pressure builds up in line 88 and fluid flows through line 90 into destroke chamber 128. Here it moves rod 134 and destrokes the pump 12. If the supply to actuator 34 is cut off by operating a valve 32 pressure in line 16 rises and moves a plunger 136 to the left thus allowing fluid to pass through lines 88, 90 into chamber 128. This causes further destroking of the pump 12. If the motor is speeded up by driving the vehicle, speed control pump 52 delivers more fluid to line 56 and flow is choked by the throttle 58. This causes plunger 78 to move to the left which again causes destroking. Operation of solenoid valve 160 also causes destroking by dead leading the flow from pump 52.
GB3058575A 1974-07-22 1975-07-22 Hydraulic control system Expired GB1474650A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/490,455 US3935706A (en) 1974-07-22 1974-07-22 Hydraulic control system
US05/490,629 US3935707A (en) 1974-07-22 1974-07-22 Hydraulic control system

Publications (1)

Publication Number Publication Date
GB1474650A true GB1474650A (en) 1977-05-25

Family

ID=27050061

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3058575A Expired GB1474650A (en) 1974-07-22 1975-07-22 Hydraulic control system

Country Status (8)

Country Link
JP (1) JPS6035562B2 (en)
BR (1) BR7504634A (en)
CA (1) CA1044991A (en)
DE (1) DE2532768C3 (en)
FR (1) FR2280129A1 (en)
GB (1) GB1474650A (en)
IT (1) IT1040988B (en)
SE (1) SE409747B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143058A (en) * 1983-06-20 1985-01-30 Komatsu Mfg Co Ltd Fluid operated pump displacement control/system

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2813486C2 (en) * 1977-03-31 1986-06-26 Kabushiki Kaisha Komatsu Seisakusho, Tokio/Tokyo Control device for hydraulic pumps
US4416590A (en) * 1981-01-08 1983-11-22 Union Carbide Corporation Hydraulic drive liquid transfer pump system
JPS5846153A (en) * 1981-09-14 1983-03-17 セタフイン・ソシエテ・アノニム Production of fabric and loom
JPH0162382U (en) * 1987-10-13 1989-04-20
DE9214007U1 (en) * 1992-10-16 1993-11-18 MABO Fahrzeug- und Anlagenbau, Entsorgungs-Systeme, Umwelttechnologie GmbH & Co., UTEF Forschung KG, 59302 Oelde Receiving container with ejection piston, especially for disposal vehicles
DE102007060208A1 (en) 2007-12-14 2009-06-18 Robert Bosch Gmbh Hydrostatic machine with a filter having a tubular jacket wall

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152445A (en) * 1963-04-12 1964-10-13 New York Air Brake Co Hydrostatic transmission
US3188971A (en) * 1962-08-13 1965-06-15 Bendix Corp Control system for a pump
US3476273A (en) * 1967-07-26 1969-11-04 Charles E Jones Refuse collection vehicle
DE1922145A1 (en) * 1969-04-25 1970-10-29 Bellows Valvair Kaemper Gmbh Combination controller
US3647098A (en) * 1970-01-19 1972-03-07 Smithpac Canada Ltd Dump body pivot system and lock
US3758235A (en) * 1971-09-22 1973-09-11 Sperry Rand Corp Power transmission
US3785754A (en) * 1972-04-27 1974-01-15 Caterpillar Tractor Co Manual override system for a variable volume pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143058A (en) * 1983-06-20 1985-01-30 Komatsu Mfg Co Ltd Fluid operated pump displacement control/system

Also Published As

Publication number Publication date
DE2532768C3 (en) 1981-03-26
SE409747B (en) 1979-09-03
FR2280129A1 (en) 1976-02-20
AU8325175A (en) 1977-01-27
BR7504634A (en) 1976-07-06
JPS6035562B2 (en) 1985-08-15
CA1044991A (en) 1978-12-26
JPS5137387A (en) 1976-03-29
SE7508281L (en) 1976-01-23
DE2532768B2 (en) 1980-08-21
IT1040988B (en) 1979-12-20
FR2280129B1 (en) 1980-05-09
DE2532768A1 (en) 1976-02-12

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee