Hydraulic control circuit and hydraulic system

Abstract

This utility model discloses a hydraulic control circuit and hydraulic system, belonging to the technical field of hydraulic control systems. The hydraulic control circuit includes a pressure reducing valve, a damper, and a first control valve. The inlet of the pressure reducing valve is connected to port C of a first two-way cartridge valve, and port B of the first two-way cartridge valve is connected to the master cylinder piston chamber. The inlet of the damper is connected to the outlet of the pressure reducing valve. The first control valve is connected between the outlet of the damper and the oil tank, and is used to control the on / off connection between the outlet of the damper and the oil tank. This utility model utilizes the sequential connection of the pressure reducing valve, the damper, and the first control valve to make the pressure difference before and after the damper controllable, adjustable, and stable. This, in turn, makes the opening size of port C of the first two-way cartridge valve stable and controllable when open, optimizing the speed conversion process of the master cylinder piston chamber, reducing impact, and improving system stability.

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