Excavator parts is suitable for XGMA 822 Sany solenoid valve coil

What are the functions of solenoid coil?

Solenoid valve is composed of electromagnetic coil and magnetic core, and it is a valve body with one or several holes. When the coil is energized or de-energized, the operation of the magnetic core will cause the fluid to pass through the valve body or be blocked, so as to change the direction of the fluid. The electromagnetic components of the solenoid valve are composed of fixed iron core, moving iron core, coil and other components; The valve body part is composed of slide valve core, slide valve sleeve and tension spring base. The electromagnetic coil is directly installed on the valve body, and the valve body is closed in a sealed tube, forming a concise and compact combination.

Working principle of solenoid valve coil

Self-locking and self-persistence are selected, and double coils are used for control. The upper coil is used for opening, and the next coil is used for closing. Only one pulse signal of the corresponding coil is needed, and the required operation condition can be ensured by instantaneous power-on, with low energy consumption, sufficient flow and long service life.

Fluid types: water, gas, oil, steam, gas, carbon dioxide, liquid nitrogen, liquid oxygen, etc. Fluid temperature: -200℃-350℃

Flow caliber: DN20-DN600 Ambient temperature: -20℃-+80℃ (specially designed: -40℃-+120℃)

Material of valve body: brass, cast iron, carbon steel and stainless steel. Operating pressure: -0.1-235MPA.

Additional voltage: AC 220v-DC 24v Other options: E explosion-proof type, X signal response, V straight device.

What is the reason for the burning of solenoid valve coil?

When the solenoid valve coil is energized, there is thermal effect besides magnetic effect. Excessive heat generated by current thermal effect makes the temperature of the coil rise continuously, which leads to the coil burning out. Thermal energy generated by current thermal effect = the square of current multiplied by the time of resistance (of the coil). That is, q = I 2rt. If the resistance r of the coil is equal to 0, q = I 2rt = 0, the coil will not generate heat. Of course, the resistance r of the coil cannot be equal to 0 in general. However, thicker wires can be used to make coils, and the resistance R of the coils is very small. Under the same current condition, the thermal energy generated by the thermal effect of current is very small, which will not cause the coils to burn out. Of course, the thermal energy generated by the thermal effect of current can be reduced by reducing the current passing through the coils, but the generated magnetic force is also reduced, which may make the solenoid valve unable to operate normally.