Causes of failure of hydraulic valve of four column hydraulic press

Causes of failure of hydraulic valve of four column hydraulic press:

1, deformation

When the working stress and external load stress of the hydraulic valve parts of the four column hydraulic press exceed the yield strength of the parts materials, the parts will deform and fail to complete the normal function. The deformation of the relief valve core or the spring of the four column hydraulic press will reduce the flexibility of its movement, cause the instability of the system pressure, or slow state transition.

2, wear

The movement of the hydraulic parts, valve sleeve, valve body and other mechanical parts of the four column hydraulic press constantly produce friction when they are used, which makes the size, shape and surface quality of the parts change, and the quality is reduced to failure. Wear or deformation of the solenoid directional valve core of four column hydraulic press will make the valve internal leakage and reduce the efficiency. At the same time, due to wear, the metal on the surface of the parts will fall off, increasing the amount of impurities in the hydraulic system and increasing the wear degree.

3. Corrosion

There is too much water or acid in the hydraulic oil of four column hydraulic press, which will corrode the surface of the relevant parts in the hydraulic valve after long-term use, making the accuracy and sealing effect of the parts invalid.

4, fatigue

Under the condition of long-term alternating load, the spring in the hydraulic valve of four column hydraulic press will be softened, the valve seat will be fatigued, cracks and other damages due to fatigue. If the spring of the reversing valve is too soft or short, it will affect the working position and normal reset of the valve core of the four column hydraulic press, so that the system can not work normally.