When a lubricant starts to leak from hydraulic equipment or a pumping system, there is a possibility of wrong or incorrect hydraulic seals being used, or the seals were not installed up to standard. The improper installation, therefore, may lead to the poor performance of the seal. Consequently, this blog will discuss how you can improve the seal performance.
1.The Influence Of The Lubricant
The seal mechanism of RSS depends mostly on the characteristics of elasticity of the sealing material. When it is combined with a right profile design, the RSS can keep the fluids in the seal gap as well as pumping them back into the space for sealing.
When temperatures are low, the elasticity of the plastic rubber composite seal gets reduced. This leads to leakage and harder brittle of the oil seal. The seal expands when temperatures are high, thus leading to a rapid increase in friction resistance of the oil seal while in operation and reduces the pressure resistance. Therefore, rubber to plastic composite seals should operate at a relatively low temperature.
3. Operating Pressure
The startup pressure is essential to oil seals. Oil seals that have low friction performance and limited aerodynamic resistance are the best choice for pressure operations. Rubber to plastic composite seals is not preferable to an environment where operating pressure is below 2.5Mpa. When the pressure is high, the seal pressure needs to be considered as well as adopting the anti-extrusion ring. You may also need groove processing as a special requirement.
4. Operating Medium
Besides selecting the operating medium in strict accordance, it is essential to follow the instruction suggested by bonded seal suppliers. It is necessary to keep the seal clean all time, oil aging and contamination leads to failure of the components as well as accelerating the aging and wear of the wiper seals. Also, the dirt scratches the seal leading to seal failure. Nevertheless, it is essential to check the quality of the cleanness of the seal regularly and replace them based on the maintenance specifications given by wiper seals suppliers. The residual air in the oil cylinder gets compressed by increased pressure, thus generating instantaneous temperatures that burn and carbonize the oil.
To prevent this from happening, it is necessary to exhaust the gas when the hydraulic system starts operating. The cylinder needs to run at low pressure for some minutes so that the residual air in the soil is confirmed to be drained before it starts to work normally
5. Lateral Load
It is crucial to install the support ring on the piston. This ensures that the cylinder withstands the heavy loads. The seal and the support ring perform similar functions. The seal cannot replace the support ring with substantial load-bearing capacity. This is necessary to prevent oil seal leakage as well as abnormal wear caused by working in eccentric conditions.
6. Hydraulic Shock
Several factors may lead to hydraulic shock, for example, when an excavator bucket hits the stone suddenly or when the crane is lifting a heavy object. Therefore high pressure and high flow of hydraulic systems, the actuator is reversed hydraulic shock may be generated when the pressure of the reversing valve is not good. The instant high pressure caused by hydraulic pressure may affect the working load several times. This later tears down the seal, and it will partially be caught in the gap within no time, causing severe injuries.
The retaining and buffer rings should be installed on the piston rod of the cylinders with hydraulic shock. The buffer ring, therefore, should be installed from the front to absorb the impact pressure and the retaining ring prevents the oil seal from getting squeezed into the gap under pressure to break the root.
7. Processing Accuracy Of Cylinder
Based on the experiment, it is clear that the wear value and the leakage of the seal oil rise when the surface is rough. This guarantees the sealing performance of the wiper seals and avoids damage to the seal during assembly.
Overall, some aspects should be considered when designing the installation of hydraulic cylinders. Some of those materials include the cylinder itself with materials like aluminum alloy, stainless steel, and carbon steel. The materials are adopted at low pressure as well as favorable friction conditions. The piston rod is another material for the same purpose as the hydraulic cylinder.