Sealing oil leakage and prevention measures

The first type of seal is not abnormal;

1. When the oil is leaking at low pressure, there is no leakage, and the surface roughness of the assembly surface is poor.----Improve the surface roughness to 3.2~6.3umry with a lower hardness.

2. The oil ring of the piston rod becomes large, and a few drops of oil will be dropped for each stroke. The cause of the dust ring is to scrape off the oil film and replace the dust ring.

3. When the oil is leaking at low temperature, there is no oil leakage. There are two reasons for the eccentricity. One is that the material selection of the seal is not suitable. The cold-resistant seal can be used to solve the problem.

The second type of seal has an abnormal condition.

1. The main oil seal is hardened on the surface, and the sliding surface is cracked; the cause----- abnormal high-speed working pressure is too high.

2. The surface of the main oil seal is hardened, and the oil seal of the whole seal is broken and broken; the reason----the abnormal temperature rise of the hydraulic oil deteriorates and the ozone damages the seal and causes oil leakage.

3. The wear of the surface of the main oil seal is as smooth as the mirror surface; the reason is that the micro-motion era is too high.

4. The mirror wear on the surface of the main oil seal is uneven. The seal has a phenomenon of swelling; the reason is that the side pressure is too large and the eccentricity is too large, and improper oil and cleaning liquid are used.

5. The sliding surface of the main oil seal has damage and wear scars; the reason is that the plating is poor, the rust point is matched with the rough surface of the piston rod, and the material is improper and contains impurities.

6. There is rupture scar indentation on the top of the main oil seal lip; reason---- improper assembly chamfer, installation, improper storage method.

7. There is an indentation on the sliding surface of the main oil seal; the reason----the hidden foreign objects.

8. There is crack crack in the lip of the main oil seal; the reason----use of improper oil, the working temperature is high or low, the back pressure is too high, the pulse pressure frequency is too large.

9. The main oil seal has carbonized charred metamorphism; the reason---- residual air produces adiabatic compression.

10. The main oil seal has cracks in the heel extrusion; the reason is that the pressure is too large, the extrusion gap is too large, the support ring is used as the seal, and the installation groove design is unreasonable.