Application of Vibratory Stress Relief Technology in Different Types of Normally Open Solenoid Valves

Vibratory stress relief technology is a very common technology in the solenoid valve series. It plays an important role in many places and performs differently under different solenoid valves, which is what we will explain in this issue.

1. Working principle of the normally open vibratory direct-acting solenoid valve

During blank processing and cutting, residual stress appears inside the workpiece, causing instability of the workpiece, which in turn affects the mechanical properties and dimensional stability of the part. The vibratory high-temperature ball valve is a method of eliminating residual stress in metal parts by striking. Under the action of cyclic external force, the 3-position 5-way normally open solenoid valve workpiece resonates; during resonance, the transformed stress and the residual stress inside the workpiece accumulate. As time passes, local deformation of the workpiece causes grain boundaries to move, and atoms transfer from a high-stable potential energy to a lower potential energy. Through this process, the macroscopic residual stress of the workpiece can be migrated, reduced, and homogenized, reducing or eliminating the internal residual stress of the workpiece.

2. Working principle of the high-temperature vibratory normally open solenoid valve device

The vibration analysis device of the high-temperature piston-type normally open solenoid valve consists of an exciter, a control host, an acceleration sensor, supporting rubber, and so on. Its main function is, under a specific excitation, to control the exciter to operate with higher stability frequency accuracy within a specific frequency (speed) range. In particular, when the load characteristics before and after the resonance peak change significantly, the curves and parameters related to the direct gas solenoid valve are recorded, identified, and derived.

3. Development of the high-temperature normally open solenoid valve

The use effect of the vibratory high-temperature solenoid valve is related to the process selected. It is a forging with strong rigidity, a rough surface, uneven thickness, large residual stress, and a complex structure. Since 2005, a certain company has introduced the vibratory copper normally closed solenoid valve and has made considerable progress so far. Based on many years of production practice, it points out that the manufacturing process of the vibratory type is relatively complex, requiring vibration pretreatment and improvement of its vibration performance through reasonable vibration parameters.