How Does a Reversing Valve Solenoid Work?

Flap valve solenoid is a common control element in construction machinery, used to change the flow direction of the hydraulic system, so as to realize the two-way movement of mechanical equipment. In this article, we will discuss the working principle of the flap valve solenoid in detail to help you better understand its application in construction machinery. The following will be divided into the following subheadings to explain the working principle of the flap valve solenoid.

The basic structure of the solenoid valve

Similar to a diesel solenoid valve, a flap valve solenoid usually consists of an iron core, a coil and a valve body. The core is the heart of the solenoid, and the coil is wrapped around the core to produce a magnetic field when energized. The valve body contains the hydraulic channels, which can change the direction of fluid flow by the action of the magnetic field.

Principle of operation in the energized state

When current passes through the coil, it generates a magnetic field which attracts the iron core. The core is attracted to one side of the coil, causing the hydraulic channels in the valve to connect to one side, allowing the fluid to flow in one direction. This state is often referred to as the "operating state".

Principle of operation in the de-energized state

When the current is switched off, the coil no longer generates a magnetic field and the core loses its attraction and returns to its initial position. In this case, the hydraulic channels in the valve body are reconfigured to allow the fluid to flow in the other direction. This state is often referred to as the "de-energized state".

Bidirectional Control

The reversing valve solenoid has a bi-directional control function, that is, it can switch the direction of fluid flow by controlling the on-off current. This bi-directional control makes it very useful in construction machinery, as it allows for bi-directional movement of machine components, such as hydraulic cylinders, to work better with other equipment components such as starter motor and alternators.

Fields of application

Flap valve solenoids are widely used in construction machinery, including excavators, loaders, bulldozers, etc. They are used to control the flow in the hydraulic system. They are used to control the flow direction in the hydraulic system to better match the use of other parts such as diesel engine parts, so that the machinery and equipment can perform different tasks, such as digging, bulldozing, lifting and so on.

Maintenance and Troubleshooting

Regular maintenance and inspections are required to ensure proper operation of the tilting valve solenoid. In the event of a malfunction, it is usually necessary to check the circuit connections, the condition of the coils, and whether the movement of the core has been impeded. Repair or replacement of damaged parts is necessary.

In conclusion, the flap valve solenoid plays a key role in construction machinery, realizing the bidirectional movement of mechanical equipment by controlling the flow of the hydraulic system. An in-depth understanding of its working principle and application areas will help engineers and operators better understand and maintain this key component to ensure the efficient operation of construction machinery.