CONTROL DEVICE FOR HYDRAULIC PUMP

PROBLEM TO BE SOLVED: To actualize the control of a two flow-way pump and a tandem pump only by making a small change to the configuration of a hydraulic circuit having a simplex pump. SOLUTION: A pressure reducing valve 5 is provided for pressure air feeding pipelines 4 (41 and 42), out of the pres...

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Bibliographic Details
Main Author MORINO KENJI
Format Patent
LanguageEnglish
Published 08.02.2000
Edition7
Subjects
BLASTING
DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
FLUID-PRESSURE ACTUATORS
FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS
HEATING
HYDRAULICS OR PNEUMATICS IN GENERAL
LIGHTING
MECHANICAL ENGINEERING
POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS
PUMPS
PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To actualize the control of a two flow-way pump and a tandem pump only by making a small change to the configuration of a hydraulic circuit having a simplex pump. SOLUTION: A pressure reducing valve 5 is provided for pressure air feeding pipelines 4 (41 and 42), out of the pressure reduction valve 5, pressure oil PE indicating pressure (P1+P2)/2 (average pressure of P1 and P2) higher than the minimum pressure out of respective pressures P1 and P2 discharged out of the respective discharging ports 1b and 1c of a hydraulic pump 1, is inputted to a PC valve 19 as driving pressure oil by way of a branch pipeline 45, and concurrently, it is also inputted as pilot pressure oil by way of a branch pipeline 4e.
Bibliography:Application Number: JP19980205134