KR960023842A - Variable hydraulic pressure booster system for heavy equipment - Google Patents

Abstract

The present invention relates to a system for boosting the hydraulic pressure of heavy equipment, the main variable relief valve (8) is provided in the control valve block (2) for distributing and supplying the pressure oil discharged from the hydraulic pump (1) to a plurality of actuators Variable actuator relief valves (11a, 12a, 13a) are provided on the sprues (11, 12, 13) for controlling the flow of pressure oil supplied to the corresponding actuators (3, 4, 5), respectively. The control valve 18 is connected to each actuator relief valve to supply a pilot pressure supplied by the main variable relief valve 8 and the variable actuator relief valves 11a, 12a, and 13a controlled by the electromagnetic proportional control valve 22. , 19, 20 to selectively supply, and the control valve (18, 19, 20) is controlled to be controlled by the electrically controlled mode controller 23, thereby varying the operating pressure of the actuator It can be boosted to maximize the efficiency of the equipment.

Description

Variable hydraulic pressure booster system for heavy equipment

Since this is an open matter, no full text was included.

1 is a hydraulic circuit diagram illustrating a variable boosting system of heavy equipment according to the present invention, and FIG. 2 is a block diagram of a program for a mode controller in the system according to the present invention.

Claims (3)

The pressurized oil discharged from the hydraulic pump 1 is generally supplied to a plurality of actuators 3, 4, 5, 6, and 7 via the control valve block 2, and each actuator is provided inside the control valve block 2. In the hydraulic control apparatus of heavy equipment equipped with a sprue (9, 10, 11, 12, 13) for controlling the flow direction of the hydraulic oil supplied to (3, 4, 5, 6, 7), the control The valve block 2 is provided with a variable main relief valve 8 which is operated by pilot pressure while setting the basic pressure of the entire hydraulic system, and each of the sprues 11, 12, 13 has a corresponding actuator 3 The variable actuator relief valves 11a, 12a, and 13a which are controlled by the pilot pressure while finally controlling the pressure of the hydraulic oil supplied to the pumps 4 and 5 are respectively provided. The main variable relief valves 8 are provided. And actuator actuator relief valves 11a, 12a, 13a are selectable A plurality of pilot pressure oil controls connected to the lock 14 and pilot lines 15, 16 and 17, while the selection block 14 is connected to the respective relief valves 8, 11a, 12a and 13a. Valves 18, 19, and 20 are provided, and the pilot pressure oil discharged to the pilot pump 21 is controlled and supplied to the control valves 18, 19, and 20 by the electromagnetic proportional control valve 22. If so, the solenoids 18a, 19a and 20a of the control valves 18, 19 and 20 provided in the selection block 14 and the solenoid 22a of the electromagnetic proportional control valve 22 are pilot pressures. Hydraulic pressure boosting system of the heavy equipment, characterized in that the electrical controller and the electrical controller 23 is selected to select the actuator. According to claim 1, wherein the relief valve is not installed in the sprue (9) for switching the hydraulic oil supplied to the traveling motor (7) in the actuator, the flow of the pressure oil supplied to the swing motor (6) The operating spun pressure control system of the heavy equipment, characterized in that the sprue (10) to control the non-variable fixed relief valve (10a) is installed. An orifice (31, 32, 33) is provided at an outlet connected to the pilot line (15, 16, 17) from the selection block (14) and each control valve (18, 19, 20). Hydraulic pressure boosting system of heavy equipment, characterized in that. ※ Note: The disclosure is based on the initial application.