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HYDRAULIC CIRCUIT DIRECTION SELECTOR VALVE FOR HYDRAULIC CIRCUIT AND CONSTRUCTION MACHINE
The purpose of the present invention is to enable the amount of oil supply to be adjusted depending on the load of an actuator. A hydraulic circuit (20) comprises: an open center path (CL) for supplying oil from a pump (P); a direction conversion valve (40) arranged on the open center path (CL) to control the supply oil, which is supplied from the pump (P), to an actuator (A1), and opening the open center path (CL) if difference pressure, which is obtained by subtracting the pressure of oil supplied to the actuator (A1) from the pressure of oil supplied from the pump (P), is greater than a set value; a throttle (21) arranged at a lower stream side than the direction conversion valve (40) on the open center path (CL); and a regulator (22) for controlling the supply amount of oil from the pump (P) depending pressure in the open center path (CL) between the throttle (21) and the direction conversion valve (40).
유압 회로(20)는, 펌프(P)로부터 오일이 공급되는 오픈 센터 통로(CL)와, 오픈 센터 통로(CL) 상에 마련되어 펌프(P)로부터 공급된 오일의 액추에이터(A1)로의 공급을 제어하고, 액추에이터(A1)로 공급하는 오일의 압력을 펌프(P)로부터 공급되는 오일의 압력으로부터 뺀 차압이 설정값보다도 큰 경우에 오픈 센터 통로(CL)를 개방하는 방향 전환 밸브(40)와, 오픈 센터 통로(CL)의 방향 전환 밸브(40)보다도 하류측에 마련된 스로틀(21)과, 스로틀(21)과 방향 전환 밸브(40) 사이에 있어서의 오픈 센터 통로(CL) 내의 압력에 따라서 펌프(P)로부터의 오일의 공급량을 제어하는 레귤레이터(22)를 갖는다.
HYDRAULIC CIRCUIT DIRECTION SELECTOR VALVE FOR HYDRAULIC CIRCUIT AND CONSTRUCTION MACHINE
The purpose of the present invention is to enable the amount of oil supply to be adjusted depending on the load of an actuator. A hydraulic circuit (20) comprises: an open center path (CL) for supplying oil from a pump (P); a direction conversion valve (40) arranged on the open center path (CL) to control the supply oil, which is supplied from the pump (P), to an actuator (A1), and opening the open center path (CL) if difference pressure, which is obtained by subtracting the pressure of oil supplied to the actuator (A1) from the pressure of oil supplied from the pump (P), is greater than a set value; a throttle (21) arranged at a lower stream side than the direction conversion valve (40) on the open center path (CL); and a regulator (22) for controlling the supply amount of oil from the pump (P) depending pressure in the open center path (CL) between the throttle (21) and the direction conversion valve (40).
유압 회로(20)는, 펌프(P)로부터 오일이 공급되는 오픈 센터 통로(CL)와, 오픈 센터 통로(CL) 상에 마련되어 펌프(P)로부터 공급된 오일의 액추에이터(A1)로의 공급을 제어하고, 액추에이터(A1)로 공급하는 오일의 압력을 펌프(P)로부터 공급되는 오일의 압력으로부터 뺀 차압이 설정값보다도 큰 경우에 오픈 센터 통로(CL)를 개방하는 방향 전환 밸브(40)와, 오픈 센터 통로(CL)의 방향 전환 밸브(40)보다도 하류측에 마련된 스로틀(21)과, 스로틀(21)과 방향 전환 밸브(40) 사이에 있어서의 오픈 센터 통로(CL) 내의 압력에 따라서 펌프(P)로부터의 오일의 공급량을 제어하는 레귤레이터(22)를 갖는다.
HYDRAULIC CIRCUIT DIRECTION SELECTOR VALVE FOR HYDRAULIC CIRCUIT AND CONSTRUCTION MACHINE
유압 회로, 유압 회로용의 방향 전환 밸브 및 건설 기계
IWASAKI HITOSHI (author) / GOTO KEISUKE (author)
2021-07-16
Patent
Electronic Resource
Korean
IPC:
E02F
Baggern
,
DREDGING
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