What Causes Solenoid Valve Failure?

In the complex systems of modern construction machinery, solenoid valves play an indispensable role as key control elements. However, occasional solenoid valve failures may have a serious impact on mechanical performance and productivity. In this paper, we will discuss in depth the various causes of solenoid valve failure in construction machinery, and how to take preventive measures to ensure stable operation of the system.

1. Solenoid valve internal pollution

The internal structure of the diesel solenoid valve is very precise, tiny pollutants such as dust, impurities, etc. may enter the valve body, blocking the channel or damage the seals. This can lead to problems such as blocked gas flow and leakage.

Preventive methods: Regular cleaning and maintenance of the solenoid valve, the use of filtration equipment such as filters can effectively reduce internal contamination.

2. Aging or damage to seals

Solenoid valve seals may deteriorate, harden or rupture with use, resulting in gas leaks or failure to shut off completely, which may also cause damage to other parts such as diesel engine parts.

Preventive measures: Regular inspection and replacement of seals, use high-quality sealing materials, avoid excessive pressure or temperature fluctuations.

3. Coil Problems

Failure of the solenoid valve coil may result in the solenoid valve not opening or closing properly. Damage to the insulation of the coil, short-circuiting of the coil, etc. may cause failure.

Preventive measures: Avoid overloading current, regularly check the insulation status of the coil, and ensure the stability of the circuit.

4. Excessive working pressure

Exceeding the operating pressure that a solenoid valve can withstand may result in deformation of the valve body, loss of sealing performance, or even damage to the valve structure, and may also affect the normal operation of, for example, starter motor and alternators.

Preventive measures: Ensure that the use of working pressure within the specified range, select the appropriate type of solenoid valve.

5. Spool stuck or damaged

The spool of the solenoid valve may be stuck or damaged during operation, resulting in the valve not being able to open or close.

Preventive measures: Regular maintenance and lubrication of the spool to ensure its smooth movement.

6. Harsh environmental conditions

Harsh working environment, such as high temperature, low temperature, humidity, etc., may lead to damage or corrosion of solenoid valve parts.

Preventive measures: Use solenoid valves that meet environmental requirements, and carry out appropriate protection and maintenance.

As the core of the control system of construction machinery, the failure of solenoid valves may have a significant impact on mechanical performance and productivity. By understanding the multiple causes of solenoid valve failure, engineers can take appropriate preventive measures to extend the service life of the solenoid valve and protect the stable operation of construction machinery. Regular inspection, maintenance and rational use are key steps in preventing solenoid valve failures to ensure that the system continues to work efficiently.