The hydraulic cylinder piston rod may encounter various problems during use. Here are some common problems and their solutions:
1. Bending of piston rod
Reason for the problem:
The piston rod will experience increased deflection deformation under long-term biased load, and if it continues to increase, problems such as abnormal noise and oil leakage may occur.
resolvent:
Check and adjust the load distribution of the hydraulic system to ensure even force distribution on the piston rod.
If the piston rod is bent, it needs to be straightened or replaced with a new piston rod.

2. Piston rod strain
Reason for the problem:
The coating on the outer surface of the piston rod has elongated scratches along the axial direction, and oil leakage begins to occur as the scratches deepen. The causes of strain can be summarized as abrasive wear, solid pollutants, low surface hardness of the rod, and excessive contact stress. When metal particles enter between the piston rod and the seal in hydraulic oil, it can cause piston rod strain.
resolvent:
Clean the hydraulic system to ensure the cleanliness of the oil and prevent solid contaminants from entering.
Improve the surface hardness of the piston rod and enhance its wear resistance.
If the piston rod has been pulled, it needs to be repaired or replaced.


3. Abnormal wear of piston rod
Reason for the problem:
The clearance between the seal and the piston rod is too small, causing abnormal temperature rise due to friction.
Improper heat treatment of the piston rod results in unstable coating on the rod body.
Sealing failure causes hard materials to enter the cylinder block.
resolvent:
Adjust the clearance between the seal and the piston rod to ensure that the clearance is reasonable.
Properly heat treat the piston rod to improve its stability and wear resistance.
Check and replace failed seals to prevent hard materials from entering the cylinder block.

4. Corrosion of piston rod
Reason for the problem:
When there is corrosive gas in the working environment of hydraulic supports, the damaged surface of the hydraulic cylinder piston rod begins to corrode, which can seriously affect the operation.
resolvent:
Improve the working environment and reduce the presence of corrosive gases.
Perform anti-corrosion treatment on the piston rod, such as coating with anti-corrosion paint.

5. Piston rod shaking
Reason for the problem:
The hydraulic cylinder piston crawls due to the low working oil level and the suction of air by the oil pump.
The main oil pump suction system of the hydraulic cylinder is experiencing air leakage.
The oil temperature of the hydraulic cylinder is too high, causing the main cylinder piston support ring to bite.
The load is too high and the main relief valve often overflows.
The auxiliary electro-hydraulic valve and unloading valve of the hydraulic cylinder are faulty.
resolvent:
Add oil to the specified level to ensure that the oil pump is working properly.
Check and repair the air leakage problem of the main oil pump suction system.
Reduce the oil temperature to ensure the normal operation of the piston support ring.
Reduce the load and avoid frequent overflow of the main relief valve.
Check and repair the faults of the auxiliary electro-hydraulic valve and unloading valve.
In summary, common problems with hydraulic cylinder piston rods include bending, pulling, abnormal wear, corrosion, and shaking. To address these issues, corresponding solutions need to be taken for repair and prevention, in order to ensure the normal operation of hydraulic cylinders and extend their service life.