Causes of valve stuck in hydraulic system

Hydraulic clamping occurs in the hydraulic system of the Hydraulic Press, which increases the wear of the slide valve and reduces the service life of the hydraulic components. In the control system, the displacement of the spool usually uses electromagnets and springs with less force. Hydraulic clamping will make the spool inoperable or unable to move, which will cause adverse consequences for the operation of the system. What are the reasons for this situation?

  • 1. During the assembly process of the hydraulic press, it is necessary to prevent the parts from bumping, pay attention to cleaning, and reduce the entry of particulate pollutants.
  • 2, the solenoid push rod on the dry solenoid valve is skewed.
  • 3. Hydraulic clamping caused by unbalanced radial force of hydraulic press.
  • 4. Increase the manufacturing precision of the valve core and valve hole.
  • 5. When the accuracy of the hydraulic valve core allows, the taper can be smoothed (that is, the small end faces the high-pressure zone). If the structure allows, the tapered shoulder can be used, and the small end of the shoulder faces the high-pressure zone, which is beneficial to the radial direction of the valve stem. Centering.
  • 6. Impurities mixed in the hydraulic oil. Dirt particles and gap blockage in the fluid of the matching gap are also important reasons for hydraulic clamping.
  • 7. Carefully remove the burrs on each shoulder on the core and the edge of the valve hole sinking groove.
  • 8. When the spool valve moves, the additional resistance and radial force are generated at the same time, sometimes the valve core or valve sleeve will also produce additional resistance of elastic deformation under the working pressure, and the liquid boundary layer in the gap between the valve core and the valve sleeve Additional resistance.
  • 9. The adsorption of polar molecules in the oil is not balanced.

The above content is the cause of the valve stuck in the hydraulic system. I hope it can be helpful to everyone. If you want to know more about hydraulic press, please call Dongguan China Machinery Co., Ltd. We will serve you wholeheartedly.

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