Performance and working principle of hydraulic proportional valve and proportional control valve

The working principle of hydraulic proportional valve is that the command signal is amplified by proportional amplifier, and the current is proportionally output to the proportional electromagnet of the proportional valve. The proportional electromagnet outputs force to move the position of the valve core in proportion, so as to control the flow rate of liquid flow in proportion, change the direction of liquid flow, and realize the position or speed control of the actuator.

In some applications with high position or speed accuracy, a closed-loop control system can be formed by measuring the displacement or speed of the actuator. Proportional valve consists of DC proportional electromagnet and hydraulic valve. The core of continuous control of proportional valve is the use of proportional electromagnet. There are many kinds of proportional electromagnets, but their working principles are basically the same. They are developed according to the control requirements of proportional valves.

Extended data:

The characteristics of hydraulic proportional valve are:

1, the electric signal is easy to transmit, and remote control can be realized simply.

2. The pressure and flow of the hydraulic system can be controlled continuously in proportion, so as to control the position, speed and strength of the actuator and reduce the impact when the pressure changes.

3. The number of parts is reduced and the oil circuit is simplified. At the same time, the use conditions and maintenance of electro-hydraulic proportional valve are the same as those of ordinary hydraulic components, and it has stronger anti-pollution performance and reliable working performance than servo valve.

References:

Baidu encyclopedia-proportional valve