Do you know what are the performance characteristics of hydraulic proportional valves?

The working principle of the hydraulic proportional valve:

1. The hydraulic proportional valve is composed of an electric-mechanical proportional conversion device (proportional electromagnet), a hydraulic pilot stage, a hydraulic power amplification stage and a detection feedback element.

2. The proportional electromagnet converts the input electrical signal into mechanical force and displacement output continuously and proportionally. After the hydraulic pilot stage receives the mechanical force and displacement, the working spool produces a corresponding displacement, which changes the size of the valve port and controls the pressure. or flow output.

3. If the output power is small, the valve output can directly control the driving actuator, which is a direct-acting electromagnetic proportional valve. If the output power is large and the working condition of large flow is required, it is necessary to increase the hydraulic power amplification stage, which is the pilot-operated two-stage electro-hydraulic proportional valve.

4. The output pressure or flow of the proportional valve is proportional to the input electrical signal, and the displacement of the valve core can also be fed back in the form of mechanical, hydraulic or electrical signals to improve the control accuracy of the proportional valve.

Performance characteristics of hydraulic proportional valve:

1. The hydraulic proportional valve can form various electro-hydraulic control systems with electrical and computer controls, and undertake the electro-hydraulic conversion link of hydraulic control or transmission system. The conversion process is controllable, the setting value can be adjusted steplessly, and fewer hydraulic components are required to meet the control requirements.

2. It can realize the working cycle process conveniently, quickly and accurately, and meet the requirements of the switching process. Through the port, the amplifier outputs an electrical signal to control the switching transition process, which can avoid peak pressure and prolong the life of mechanical and hydraulic components.

3. The electrical signals used to control the direction, flow and pressure directly control the actuator through the proportional valve, so that the dynamic performance of the hydraulic system is improved, and it is easy to realize remote and automatic control by using electrical signals.

4. The hydraulic proportional valve has a simple structure and can be mass-produced. It is flexible and convenient to install and use, with moderate control precision and strong anti-pollution ability.