Analysis of the discoloration of the commercial cylinder Rod
Many commercial cylinders, especially hydraulic cylinders for excavators, have encountered the problem of cylinder discoloration, thinking that the quality of the cylinder is a problem. In fact, in many cases, the discoloration of the cylinder has nothing to do with its quality.Reasons for the discoloration of the piston rod of the commercial hydraulic cylinder and its treatment.
The phenomenon that the cylinder becomes black, blue or purple is not because the cylinder itself changes color, but because the cylinder surface is covered with a colored film, so it is not a problem of the cylinder itself. Under normal circumstances, the cylinder will first become blue, then the color will deepen, become purple, and eventually become black.
There are many reasons for the discoloration of the commercial hydraulic cylinder. The following are the common reasons for discoloration.
1. There is a high temperature phenomenon in the hydraulic system, and the piston rod frequently comes into contact with the low temperature environment (the temperature drops suddenly) at a high temperature during work (especially in the cold season);
2. In the maintenance period, the special hydraulic oil for excavators of this brand is replaced, and the discoloration of the piston rod generally occurs within a few days after the oil is changed. The reason is that the quality and performance of an extreme pressure anti-wear additive in hydraulic oil are different;
3. The blue of the cylinder is caused by the additives in the oil seal and hydraulic oil attached to the cylinder rod at high temperature, and the blackening is caused by the lead-containing additives in the spray in the cup (ie wear-resistant sleeve) attached to the cylinder at high temperatures. On the pole. Generally, the hydraulic oil temperature is too high, and this phenomenon mostly occurs in the first half of the bucket cylinder that is used more often. We recommend cleaning the radiator frequently to ensure the heat dissipation effect.
Methods to deal with the discoloration of the commercial hydraulic cylinder rod:
If there is a very small part of the blue in the cylinder, you can ignore it, it will disappear automatically after a period of time;
If the discoloration is serious, you need to replace the oil seal and wear sleeve. At the same time, try to avoid the high temperature of the hydraulic oil, and it will return to normal after a while.
