JPH0478307U

JPH0478307U -

Info

Publication number: JPH0478307U
Application number: JP12166190U
Authority: JP
Priority date: 1990-11-20
Filing date: 1990-11-20
Publication date: 1992-07-08

Description

[Brief explanation of drawings]

第１図は本考案に係る油圧制御装置の回路図、
第２図はポテンシヨ出力とそれにより決定される
方向切換弁の開口面積との関係図、第３図は方向
切換弁のスプールのストロークと開口面積との関
係図である。１……ポンプ、２……回転センサ、３……スト
ロークセンサ、４……制御盤、５……ポテンシヨ
センサ、６……レバー、７……操作レバー、８，
９，１０……方向切換弁、１１，１２，１３……
圧力センサ、１４，１２，１６……アクチユエー
タ。 FIG. 1 is a circuit diagram of a hydraulic control device according to the present invention,
FIG. 2 is a diagram showing the relationship between the potentiometer output and the opening area of the directional valve determined thereby, and FIG. 3 is a diagram showing the relationship between the stroke of the spool of the directional valve and the opening area. 1... pump, 2... rotation sensor, 3... stroke sensor, 4... control panel, 5... potentio sensor, 6... lever, 7... operation lever, 8,
9, 10... Directional switching valve, 11, 12, 13...
Pressure sensor, 14, 12, 16...actuator.

Claims

[Scope of utility model registration request]

In a hydraulic circuit in which a plurality of actuators 14, 15, 16... are driven by one pump 1 via directional control valves 8, 9, 10... connected in parallel, the load pressure of each actuator is Pressure sensors 11, 12, 13 to detect..., rotation sensor 2 to detect the rotation speed of pump 1, pump 1
The pump 1 is equipped with a stroke sensor 3 that detects the number of extrusions, and a potentiometer sensor 5 that detects the amount of operation of the lever 6 of each operating lever 7. The discharge amount is distributed according to the required flow rate of each actuator determined by the amount of operation of the lever 6, and the stroke of the directional control valve is applied to the actuator with the maximum load pressure so that the opening area is determined by the amount of operation of the lever 6. is set, and for other actuators, the pressure loss that occurs before and after the directional control valve when the distributed flow flows is determined by "differential pressure between the maximum load pressure and the load pressure of the relevant actuator" and "the pressure loss of the actuator with the maximum load pressure". A hydraulic control device characterized in that the stroke is set by calculating the opening area of each directional switching valve 8, 9, 10, etc. so that the sum of "pressure loss occurring before and after the directional switching valve" is obtained. .