Metallurgical hydraulic cylinder is a kind of rolling tool to apply a certain pressure on the surface of the workpiece after the operation of the work, so the pressure is very important in the metallurgical hydraulic cylinder, and to have pressure, it is necessary to ensure the sealing of the hydraulic cylinder, if the sealing is not good or there is a failure, then the normal work of the hydraulic cylinder will be affected. I believe that many friends in the industry are aware of this, so what causes metallurgical hydraulic cylinder seal failure? What kind of protection should we take?
1, back pressure structure design problems
The failure of the hydraulic cylinder seal may be due to the design of the back pressure structure. In the hydraulic system, if the two sealing rings are installed in series before and after, the micro-oil film will form an oil ring. If the operating stroke of the metallurgical hydraulic cylinder is far, the pressure of the oil ring will rise rapidly or even exceed the pressure of the system, resulting in a decline in sealing performance. For this problem, the solution is to improve the seal design to avoid this defect.
Metallurgical hydraulic cylinder
2, the equipment installation and starting structure is unreasonable
The installation and startup structure of the device is improper. Installation will also have a great impact on sealing performance. In the installation of metallurgical hydraulic cylinder seals, professional tools need to be used, and operated by professionals, the entire installation process must be careful, can not cause damage or deformation of seals and other problems. In order to prevent this, the sealing ring must be installed in accordance with the correct requirements and coated with lubricant for protection.
3. The equipment is polluted by gas
(1) Because the equipment is polluted by gas, there is a problem of seal failure. It is found that the atmospheric pollution accounts for a large proportion of the reasons for the problems of the metallurgical hydraulic cylinder seal. Under normal circumstances, at a standard atmospheric pressure, the oil can dissolve about nine percent of the air, the pressure increases the solubility, the pressure decreases, the air will escape. Therefore, in order to avoid this problem, the air should be discharged before using the hydraulic system.
(2) For the damage caused by gas pollution, there are two phenomena. The first is a phenomenon that we are familiar with and know very well, commonly known as cavitation. If the sealing surface of the metallurgical hydraulic cylinder is damaged, the hydraulic oil flows through the longitudinal wound at a high speed and a great acceleration and intensifies the wear, and the particles that fall off the metal surface scratch the seal and the sealing surface again with the flow of the liquid, thus aggravating the seal failure. Therefore, the corresponding exhaust device should be configured for the hydraulic system.
Hydraulic cylinder
(3) The other is the so-called Diesel effect. This phenomenon may be unfamiliar to some people, but its impact is very large. When the effect appears near the seal or support ring, the metallurgical hydraulic cylinder seal and support ring will be scorched. Not only that, the hard particles produced by the charred parts can also cause system failure.
The above is the cause of the failure of the metallurgical hydraulic cylinder seal and the full content of the protective measures, the above content we can understand that in the case of the failure of the seal ring, the metallurgical hydraulic cylinder will not work normally, the general reason for the failure of the seal is because of the problem of the design of the back pressure structure, or because the installation of the equipment and the starting structure are unreasonable. As long as we solve these problems, we can ensure the normal use of metallurgical hydraulic cylinders.
