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Structural Principle Of Air Compressor Electromagnetic Valve
- Jun 29, 2018 -

1.Direct-acting solenoid valve: There are two types, normally closed and normally open.


Normally closed type when the power is off, when the coil is energized, electromagnetic force is generated, so that the moving core overcomes the spring force and the static iron core directly opens the valve and the medium is the passage; when the coil is powered off, the electromagnetic force disappears, and the moving iron disappears. The core is reset under the action of the spring force, and the valve port is closed directly, and the medium is blocked. Simple structure, reliable operation, normal work under zero differential pressure and micro vacuum. Normally open type is just the opposite. If less than φ6 flux diameter solenoid valve.


2.Step-by-step direct-acting solenoid valve: The valve adopts one-time valve opening and secondary valve opening. The main valve and pilot valve step by step make the electromagnetic force and pressure difference directly open the main valve port.


When the coil is energized, an electromagnetic force is generated to cause the moving iron core and the static iron core to pull in. The pilot valve port is opened and the pilot valve port is disposed on the main valve port, and the moving iron core is connected with the main valve core. At this time, the main valve is The pressure of the chamber is unloaded through the pilot valve port, and the main valve core is moved upwards under the influence of the pressure difference and the electromagnetic force to open the main valve medium. When the coil is de-energized, the electromagnetic force disappears. At this moment, the moving iron core closes the pilot valve hole under the action of its own weight and spring force. At this moment, the medium enters the upper cavity of the main valve core in the balance hole, so that the pressure of the upper cavity rises. The main valve is closed under the action of the spring return and pressure, and the medium is shut off. Reasonable structure, reliable operation, and reliable operation at zero differential pressure. Such as: ZQDF, ZS, 2W and so on.

 

3.

Indirect Pilot Solenoid Valve: This series solenoid valve is formed by combining the pilot valve and the main valve core to form a channel; normally closed type is closed when it is not energized.


When the coil is energized, the generated magnetic force causes the moving iron core and the static iron core to pull in, the pilot valve port opens, and the medium flows toward the outlet. At this time, the pressure in the upper cavity of the main valve plug decreases, which is lower than the pressure on the inlet side, forming a pressure difference against the spring. The resistance moves upwards and reaches the purpose of opening the main valve port, and the medium circulates. When the coil is de-energized, the magnetic force disappears and the moving iron core resets and closes the pilot port under the action of the spring force. At this moment, the medium flows from the balancing hole, the pressure of the upper cavity of the main valve core increases, and the downward movement of the main valve core is caused by the force of the spring. Close the main valve port. The normally open principle is just the opposite. Such as: SLA, DF (φ15 above diameter), ZCZ and so on