The function of proportional solenoid valve, the control principle of proportional solenoid valve

Proportional solenoid valve The role of

Proportional solenoid valves are either switch-controlled or continuously controlled. The switch control is either all open or all closed, and the flow rate is either the maximum value or the minimum value. Continuous control is manual, similar to a throttle valve, which is electronically controlled.

Control principle of proportional solenoid valve

Opening of the valve Related: The working principle of the proportional solenoid valve is derived from the solenoid switch valve. When the power is cut off, the spring will The iron core presses directly on the valve seat, forcing the valve to close. When the coil is energized, the electromagnetic force generated will suppress the spring and lift the iron core, and the valve will open.

Solenoid valve and coil current:On the valve switch, the proportional solenoid valve has been slightly modified. That is, no matter what kind of coil current, the electromagnetic force and the spring force are balanced. The current size of the coil or the size of the magnetic force will directly affect the embolization valve action process or the valve opening, thereby achieving an ideal linear connection relationship between the coil current and the valve opening.

Power direction:The flow direction of the ordinary direct-acting proportional solenoid valve is downward. When the medium flows under the valve seat, the direction of the directional force is the same as the electromagnetic force, but opposite to the direction of the spring force, so the minimum and minimum current input values ​​need to be adjusted under working conditions. The thunder fluid is normally closed when the power is cut off.

When the signal of the solenoid proportional valve is strong, use the air supplySolenoid valve changes direction so that the solenoid pilot valve used as exhaust is in 7 in the reset state. When the air supply pressure is from the SUP port to the 1-5 port, corresponding measures must be taken, such as increasing the pressure in the pilot chamber, and then acting on the top of the diaphragm 2.

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