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[Chemical Knowledge]：The working principle of electro-hydraulic reversing valve is revealed

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Electro-hydraulic directional valve (Electro-hydraulic directional valve) is one of the most common hydraulic control components, widely used in various hydraulic systems. Its main function is to control the direction and flow of liquid flow, and realize the functions of positive and negative conversion, pressure control and flow distribution of the system.

in the hydraulic system, we often need to control the oil flow. For example, when the hydraulic cylinder needs to move forward or backward, we need to ensure that the fluid flows into one cavity of the hydraulic cylinder and out of the other cavity, which requires the use of an electro-hydraulic reversing valve. At this time, the electro-hydraulic reversing valve receives an electrical signal and converts it into a hydraulic signal, so that the oil flow flows along the required pipeline, thereby achieving forward or reverse movement.

What is the working principle of the electro-hydraulic reversing valve? How does it realize the control of oil flow? Let's take a look. The basic structure of the

electro-hydraulic reversing valve The structure of the

electro-hydraulic reversing valve is shown in the figure, which is mainly composed of a valve core, a valve body, a driving mechanism and an electromagnet.

Among them, the valve body is the main part of the electro-hydraulic reversing valve, usually made of cast iron or aluminum alloy. Its internal movement of the spool and positioning of the valve seat, used to control the flow of oil. There is a small gap between the valve core and the valve seat to ensure that the liquid between the valve core and the valve seat can flow freely.

drive mechanism generally uses an electromagnet to control the switch of the electro-hydraulic reversing valve. When the electromagnet is energized, a certain magnetic field will be generated, which attracts or pushes the valve core to open or close it. In this way, the flow of oil can be controlled.

The working principle of the electro-hydraulic reversing valve is

in the hydraulic system. The electro-hydraulic reversing valve is usually used to control the flow direction or flow of the oil. Its working principle can be simplified to the following steps:

1. Electromagnet is energized to generate a magnetic field.

2. Under the action of magnetic force, the driving mechanism pushes or attracts the valve core.

3. spool to a specific position within the valve body, change the flow of the valve body.

4. liquid flows through the valve core and valve seat between the channel, change its flow direction or flow.

5. When the electromagnet is powered off, the driving mechanism releases the electromagnet and returns to the original state. Under the normal working condition of the

, the electro-hydraulic reversing valve is a three-way valve or a four-way valve. It contains multiple or single spools and sequentially arranged seats. When the solenoid successfully attracts the valve core, the valve core can move along the flow path of the valve body, thus changing the flow direction and flow rate of the oil in the hydraulic system. When the electromagnet is powered off, the spool will return to its original position and restore the original state of the hydraulic system.

electro-hydraulic directional valve is an important control element of hydraulic system, which can realize the positive and negative conversion, pressure control and flow distribution of hydraulic system. In the application process, only in-depth understanding of its working principle and performance, in order to better play its advantages, to achieve efficient operation of the system.

conclusion

Through the above analysis, we can find that the electro-hydraulic reversing valve plays an important role in the hydraulic system. Its working principle is simple and easy to understand, but it involves many technical problems. Therefore, in the face of different working environments and working conditions, we must take into account different actual conditions, comprehensively consider various factors, and reasonably select the electro-hydraulic reversing valve and other related hydraulic components to achieve the best system control effect.