Title:
COMBINED FLOW TYPE FLOW CONTROL CIRCUIT ASSOCIATED WITH PRESSURE COMPENSATION
Document Type and Number:
Japanese Patent JPS57177405
Kind Code:
A
Abstract:
PURPOSE:In a flow control circuit for a hydraulic circuit havng a plurality of pumps, to enable the selection of the flow control pattern and the quick flow control, by combining or separating the delivery flow of each pump in accordance to the exchange operation of an exchange valve and the opening of a throttle valve. CONSTITUTION:A throttle valve 15 is placed in the main line 13 for connecting an actuator 12 to the delivery side of variable pump 11. A load sensing valve 21, a pilot valve 22 fir controlling the pressure having similar structure and surge abosrbing valve 23 in the shape of a relief valve are provided between said valve 15 and the pump 11. Furthermore a fixed pump 71 is provided where the delivery line 72 is connected to the main line 13 at the upstream of the valve 15 while simultaneously connected to a bypass type pressure compensation valve 74. The spring chamber of said valve 74 can connect a two-way exchange electromagntic valve 77 to the downstream of a tank 80 and the throttle valve 15. The pilot line 78 between the valves 74, 77 is connected through a relief valve 87 to the tank 89.
Inventors:
MASUDA KENJI
Application Number:
JP6302281A
Publication Date:
November 01, 1982
Filing Date:
April 25, 1981
Export Citation:
Assignee:
DAIKIN IND LTD
International Classes:
F15B11/00; F15B11/02; F15B11/05; (IPC1-7): F15B11/00; F15B11/02; F15B11/05
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