Analysis of the cause of hydraulic valve failure: hydraulic clamping

September 11, 2019

In the above we have analyzed the hydraulic valve cylindrical spool structure, the radial imbalance force acting on the spool causes the spool to become stuck, called "hydraulic clamping."

The "hydraulic clamping" in the hydraulic system is the result of the radial imbalance of the spool due to the geometry error of the spool motion pair and the change in the coaxiality.

2, the danger of hydraulic clamping

A slight hydraulic clamping increases the frictional resistance when the spool moves, which can cause the control of the system components to lag behind and cause the hydraulic equipment to malfunction.

1 When the hydraulic clamping resistance is greater than the movement force of the spool, the spool will be hydraulically stuck and cannot move.

2 If the movement of the hydraulic spool is driven by electromagnetic force, the AC solenoid is easily damaged if the spool is hydraulically stuck.

3 Hydraulic clamping will accelerate the wear of the spool and reduce the service life of the components.

3, the elimination of hydraulic clamping

1 should improve the cleanliness of hydraulic oil and reduce the ingress of particulate pollutants.

2 The probability of the valve core and the valve hole mating surface. To ensure the accuracy of the valve core and valve hole.

3 When assembling and installing the slide valve, the tightening torque is guaranteed and it should be evenly tightened.

4 Guarantee the proper temperature in the use of hydraulic oil to prevent the valve core from being deformed by thermal expansion.

5 For the valve core with the pressure equalization groove on the surface, pay attention to the smooth flow of the pressure equalization groove.

----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant

Copyright http: / (Dalan Motor) Reprint, please indicate the source
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn

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