What is A Servo Assisted Solenoid Valve

Servo-assisted solenoid valves are a key technology in the field of construction machinery, and they play an important role in hydraulic system control. Here will introduce servo-assisted solenoid valves in depth, explaining their working principle, application areas and their importance in construction machinery.

 

What is a servo assisted solenoid valve?

A servo assisted solenoid valve, often referred to simply as a servo solenoid valve, is an electronically controlled hydraulic component used to precisely control fluid flow in a hydraulic system. It combines the characteristics of diesel solenoid valve and servo valves to adjust the operation of the hydraulic system through electronic control to achieve precise control of the actuator. Servo assisted solenoid valve usually consists of solenoid coil, valve spool, valve seat, oil circuit, etc. It is characterized by high precision, high responsiveness and programmability.

 

Principle of operation

The core component of the servo solenoid valve is the solenoid coil. When current is supplied through the wire, the solenoid coil generates a magnetic field. The size and polarity of this magnetic field is controlled by the current, so the magnetic field strength of the solenoid can be controlled by changing the current.

 

The servo solenoid valve internally consists of a spool (also known as a stem) and a seat. The spool is a movable part that sits on the seat. The movement of the spool can change the state of the valve's passage.

 

Servo solenoid valves contain fluid passages which allow fluid (usually hydraulic fluid) to flow between different pipes and hydraulic components. These passages are usually controlled by the relative positions of the valve seat and spool.

 

For precise control, servo solenoid valves are often equipped with feedback devices, such as position sensors. These sensors monitor the position of the spool and feed this information back to the control system to adjust the current to the solenoid coil in real time.

 

When current passes through the solenoid coil, the resulting magnetic field acts on the spool, causing it to move. The movement of the spool changes the state of the liquid passage, thereby controlling the flow of liquid in the hydraulic system. By controlling the size and direction of the current, the position of the spool can be precisely adjusted to control the flow, pressure, direction and flow rate of the liquid in the hydraulic system to work better with other diesel engine parts.

 

One of the keys to servo solenoid valves is feedback control. By constantly monitoring the position of the spool and comparing it to the desired position, the control system can adjust the current to the solenoid coil in real time to keep the spool in the desired position, thus realizing precise hydraulic control.

 

Application Areas

Servo-assisted solenoid valves have a wide range of applications in construction machinery. They are commonly used in the following areas:

 

1.Excavators and loaders

In excavators and loaders, servo solenoid valves are used to control hydraulic cylinders for accurate positioning and movement of the digging arm and bucket. This helps to improve the accuracy and productivity of the machinery and also better complements the efficient operation of other equipment such as starter motor and alternators.

 

2.Cranes

Cranes require precise control to lift, lower, rotate and move loads. Servo solenoid valves play a key role in these tasks, ensuring safe and precise maneuvering of the load.

 

3.Bulldozers and Rollers

Servo solenoid valves are used to control the hydraulic systems of bulldozers and rollers for land leveling and road compaction in land leveling and road construction.

 

4.Drilling equipment

Drilling equipment requires high-precision hydraulic control to drive drill bits and drill rods, and servo solenoid valves ensure accurate drilling in underground construction.

 

Importance in construction machinery

The importance of servo-assisted solenoid valves in construction machinery cannot be overstated. They enable construction machinery to perform a wide range of tasks by providing precise hydraulic control, thereby increasing productivity and job quality. In environments where large and complex work tasks need to be handled, the high reliability and performance of servo-solenoid valves is critical.

 

In summary, servo-assisted solenoid valves are an important technology in the field of construction machinery, and their working principle, wide range of applications and key role in improving the performance of construction machinery are all worthy of in-depth study and understanding. Through reasonable servo solenoid valve configuration and control, construction machinery can be more efficient and precise to complete a variety of work tasks.