1. The screw that adjusts the pressure loosens the lock nut due to vibration, causing pressure fluctuations;
2. The hydraulic oil is not clean, there is a smile of dust, so that the main spool sliding inflexible, resulting in irregular pressure changes, and sometimes the valve stuck
3. Poor sliding of the main valve core causes the damping hole to block
4. The conical surface of the main valve core is not in good contact with the conical surface of the valve seat and has not been well run-in.
5. The cow hole of the main valve core is too large and does not play a damping role
6. The pilot valve alignment spring is bent, causing poor contact between the valve core and the cone valve seat and uneven wear.
引起315吨液压机压力波动的原因有哪些？怎么处理？
315 ton hydraulic pressSolutions to cause pressure fluctuations;
1. Clean the hydraulic oil tank and pipeline regularly, and filter the hydraulic oil entering the oil tank and pipeline system
2. If there is a filter in the pipeline, the secondary filter element should be added, or the filtering accuracy of the secondary element should be replaced, and the valve components should be disassembled and cleaned, and the clean hydraulic oil should be replaced.
3. Repair or replace unqualified parts
4. Appropriate reduction315 tonshydraulic press damping aperture