What are Proportional Solenoids for Hydraulics?

Hydraulic proportional solenoid valve is an important component in the hydraulic system. Its function is to control the flow and pressure of liquid in the hydraulic system to achieve precise control of hydraulic actuators (such as hydraulic cylinders, hydraulic motors, etc.). Compared with ordinary solenoid valves, hydraulic proportional solenoid valves have higher control accuracy and adjustability, so they are widely used in situations where precise control of hydraulic system parameters is required.

The basic structure of a hydraulic proportional solenoid valve includes components such as a solenoid coil, a valve core, a valve body, and a proportional control core. When the solenoid coil is energized, the generated magnetic field acts on the valve core, causing it to move, thereby changing the channel state inside the valve body and controlling the flow of liquid. By adjusting the input current of the solenoid coil, the position of the valve core can be accurately controlled, thereby achieving precise adjustment of the output flow.

The working principle of the hydraulic proportional solenoid valve is based on hydraulic proportional technology, that is, by changing the position of the valve core to control the flow or pressure of the output hydraulic pressure, thereby achieving precise control of the hydraulic system. In the hydraulic system, the hydraulic proportional solenoid valve can adjust the spool position according to the input signal, thereby adjusting the flow and pressure in the hydraulic system, thereby achieving precise control of the hydraulic actuator.

Hydraulic proportional solenoid valves are widely used, mainly including the following aspects:
1. CNC machine tools: In CNC machine tools, hydraulic proportional solenoid valves are used to control the movement speed and position of the hydraulic cylinder to achieve precise control of each axis of the machine tool. By adjusting the input signal of the hydraulic proportional solenoid valve, the speed and position of the hydraulic cylinder can be accurately controlled, thereby improving the processing accuracy and efficiency of CNC machine tools.
2. Injection molding machine: In the injection molding machine, the hydraulic proportional solenoid valve is used to control the switching action and pressure adjustment of the injection molding machine to achieve the molding of plastic products. By adjusting the input signal of the hydraulic proportional solenoid valve, the action speed and pressure of the injection molding machine can be accurately controlled, thereby improving the quality and production efficiency of injection molded products.
3. Hydraulic excavator: In a hydraulic excavator, the hydraulic proportional solenoid valve is used to control the hydraulic cylinder and hydraulic motor in the hydraulic system to realize the movement and work of the excavator. By adjusting the input signal of the hydraulic proportional solenoid valve, various actions of the hydraulic excavator can be accurately controlled, thereby improving the operating accuracy and efficiency of the excavator.
4. Other industrial and mechanical equipment: Hydraulic proportional solenoid valves are also widely used in various industrial and mechanical equipment, such as hydraulic punches, hydraulic presses, hydraulic cranes, etc. By adjusting the input signal of the hydraulic proportional solenoid valve, various parameters of the equipment can be accurately controlled, thereby improving the operating accuracy and efficiency of the equipment.