Working principle of festo solenoid valve, interpretation of festo solenoid valve model

An example of interpretation of the festo solenoid valve model: the meaning of each character of the festo solenoid valve MFH-5-1/8-B. 1. MFH refers to Festo’s tiger valve series, single solenoid control. 2.5 refers to the two-position five-way, that is, 1 air inlet, 2 working ports, and 2 exhaust ports. 3. 1/8 refers to the threaded interface where the air inlet, working port and air outlet are all G1/8. 4. B refers to the 2000 type tiger valve. The difference is that the mounting hole of this solenoid valve is different from the traditional tiger valve without B. 5. At the same time, the overall model of this solenoid valve determines that it uses an F-type solenoid coil, which needs to be ordered separately. The solenoid valve is mechanically spring reset, and the pilot air is piloted in the air inlet. The working principle of the festo solenoid valve. There is a closed cavity in the festo solenoid valve. There are through holes at different positions. Each hole leads to a different oil pipe. There is a valve in the middle of the cavity and two electromagnets on both sides. Which side is the magnet coil? When the valve body is energized, it will be attracted to which side, and the movement of the valve body is controlled to block or leak out different oil drain holes. The oil inlet hole is normally open, and the hydraulic oil will enter different oil drain pipes and then pass through The pressure of the oil pushes the piston of the oil cylinder, the piston drives the piston rod, and the piston rod drives the mechanical device. In this way, the mechanical movement is controlled by controlling the current of the electromagnet. The working principle of the festo direct-acting solenoid valve: when the power is on, the solenoid coil generates electromagnetic force to lift the closing member from the valve seat, and the valve opens;when the power is off, the electromagnetic force disappears, and the spring presses the closing member on the valve seat, and the valve closes. The working principle of festo distributed direct-acting solenoid valve: It is a principle that combines direct-acting and pilot-operated. Normally closed type---when there is no pressure difference between the inlet and the outlet, the electromagnetic force directly opens the pilot hole and connects the main valve piston upwards after energization, and the valve opens;when the inlet and outlet reach the starting pressure difference, after energization, the electromagnetic force first When the pilot hole is opened, the pressure in the upper chamber of the main valve piston drops, thereby using the pressure difference and electromagnetic force to pull the main piston, and the valve port opens;when the power is turned off, the pilot hole is closed by spring reset, and the upper chamber of the main piston is pressurized, pushing the main piston downward. Move and the valve closes. Normally open is the opposite of normally closed. Working principle of festo pilot solenoid valve: Normally closed---when energized, the electromagnetic force attracts the pilot hole spool, the pilot hole opens, and the pressure in the upper chamber of the main valve piston drops, forming an upper and lower chamber in the main piston upper and lower chambers. The pressure in the lower chamber pushes the main piston to open the valve;when the power is turned off, the spring force resets and closes the pilot hole, and the upper chamber of the main piston is pressurized, forming an upper and lower pressure in the upper and lower chambers of the main piston. The medium pressure and The spring force pushes the main piston and the valve closes. Normally open is the opposite of normally closed. The working principle of festo diaphragm solenoid valve: when energized, the electromagnetic force opens the pilot hole, and the pressure in the upper chamber drops rapidly, forming an upper, lower, and higher pressure difference around the closing member. The fluid pressure pushes the closing member to move upward, and the valve opens;When the valve is powered on, the spring force closes the pilot hole, and the inlet pressure quickly passes through the bypass hole and forms a pressure difference between the lower and upper parts around the valve closing part. The fluid pressure pushes the closing part downward to close the valve. The working principle of the festo piston solenoid valve: After the coil is energized, due to the suction effect, the moving iron core moves down, pressing down the valve plug of the auxiliary valve, closing the auxiliary valve, and the pressure in the main valve cup rises. When the pressure rises to a certain value, the main valve The pressure difference between the upper and lower valve cups is the same. Due to the electromagnetic force, the moving iron core loses its position under the main valve cup, pressing the main valve seat and closing the valve. When the coil is powered off, the electromagnetic suction force of the solenoid valve is zero. The valve plug and support core of the auxiliary valve are lifted upward due to the action of the spring. The auxiliary valve opens, and the fluid on the main valve cup flows away through the auxiliary valve, reducing the impact on the main valve. When the pressure on the main valve cup is reduced to a certain value, the pressure difference is used to push up the main valve cup, the main valve opens, and the medium flows. The above is the working principle of the festo solenoid valve, and the introduction to the interpretation of the festo solenoid valve model. 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