The hydraulic system is mainly composed of five parts: power element (oil pump), executive element (oil cylinder or hydraulic motor), control element (various valves), auxiliary element and working medium.
Which will introduce the relationship between hydraulic control valve and hydraulic reversing valve, working principle and classification
1. Hydraulic control valve:
The working principle and classification of hydraulic control valve
The function of the hydraulic control valve (referred to as hydraulic valve) in the hydraulic system is to control and adjust the flow direction, pressure and flow of the oil in the hydraulic system, so that the actuator and the working mechanism it drives can obtain the required movement direction, thrust (torque) and movement speed (rotation speed), etc.
Hydraulic control valve refers to the component used in hydraulic transmission system or hydraulic control system to control the pressure, flow and direction of liquid. The one that controls the pressure is called the pressure control valve, the one that controls the flow is called the flow control valve, and the one that controls the on, off and flow direction is called the directional control valve.
2. Hydraulic reversing valve:
The working principle and classification of hydraulic reversing valve
The reversing valve is a valve that changes the movement direction of the actuator by changing the oil flow direction. There are many types of reversing valves. Generally, they can be divided into manual reversing valves, motor reversing valves, electromagnetic reversing valves, hydraulic reversing valves, and electro-hydraulic reversing valves according to different control methods.
The hydraulic reversing valve is divided into: two-way, three-way, four-way and five-way according to the number of passages controlled by the reversing valve. The absolute movement of the valve core is used to offset the valve body to make the oil flow, close or change the direction of oil flow, so as to make the hydraulic actuator and its driving mechanism bear, end or change the direction of movement.
Among them, the hydraulic solenoid valve is an automatic basic component used to control the fluid, which belongs to the actuator. Hydraulic solenoid valves are used to control the direction of hydraulic flow. The mechanical devices of the factory are generally controlled by hydraulic cylinders, so hydraulic solenoid valves are used.
The hydraulic solenoid valve has a closed cavity, with through holes at different positions, each hole is connected to a different oil pipe, the middle of the cavity is a piston, and the two sides are two electromagnets. Where, by controlling the movement of the valve body to open or close different oil discharge holes, and the oil inlet hole is normally open, the hydraulic oil will enter different oil discharge pipes, and then the piston of the oil cylinder is pushed by the pressure of the oil. It drives the piston rod, and the piston rod drives the mechanical device, so that the mechanical movement is controlled by controlling the current on and off of the electromagnet.
The slide valve is a diverter valve that uses the valve core (plunger, valve disc) to slide on the sealing surface to change the position of the fluid inlet and outlet channels to control the fluid flow. The slide valve is often used in steam engines, hydraulic and pneumatic devices, etc., so that the movement mechanism can obtain a predetermined direction and stroke action or realize automatic continuous operation.
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