Rubber Rings Manufacturer Introduces The Strategy Of Using Rubber Seals
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Rubber seals often leak oil, water, grease, etc. This is caused by the internal and external factors of the seal. Next, Rubber Rings Manufacturer will tell you the reasons why the rubber seals are not tightly sealed.
1. Hydraulic shock
There are many factors that produce hydraulic shock, such as the moment when the excavator bucket suddenly hits a stone, the crane lifts or puts down a heavy object. Except for factors, for high-pressure and large-flow hydraulic systems, when the actuators (hydraulic cylinders or hydraulic motors, etc.) are reversing, if the performance of the reversing valve is not good, it is easy to produce hydraulic shocks. The instantaneous high pressure generated by hydraulic shock may be several times the working pressure of the system. Such high pressure will tear the oil seal or partially squeeze it into the gap in a very short time, causing serious damage. Generally, the cylinder with hydraulic shock should be equipped with buffer ring and retaining ring on the piston rod.
2. Movement speed
When the movement speed is very low (<0.03m/s), the smoothness of the equipment operation and whether there is "creeping" phenomenon should be considered. When the moving speed is very high (>0.8m/s), the lubricating oil film may be destroyed, and the rubber seal ring will not get good lubrication and friction and heat will cause the life to be greatly reduced.
3. Working medium
In addition to selecting the working medium strictly in accordance with the manufacturer's recommendations, it is important to keep the working medium clean. The aging or contamination of the oil will not only cause the components in the system to malfunction, accelerate the aging and wear of the oil seal, but also the dirt may scratch or be embedded in the oil seal, making the rubber sealing ring seal ineffective. Therefore, the oil quality and cleanliness must be checked regularly, and the oil filter or oil must be replaced according to the equipment's maintenance specifications. The air remaining in the oil in the oil tank will produce high temperature after high pressure compression, which will cause the oil seal to burn out and even carbonize. In order to avoid this situation, exhaust treatment should be carried out at the beginning of hydraulic system operation. The hydraulic cylinder should also run at low pressure and slow speed for several minutes to confirm that the residual air in the oil has been drained before it can work normally.
4. Side load
Generally, a support ring must be installed on the piston to ensure that the cylinder can withstand larger loads. The rubber seal and the support ring play completely different roles, and the rubber seal cannot replace the load of the support ring. For hydraulic cylinders with lateral force, a support ring with strong load-bearing capacity must be added (a metal ring can be used for heavy loads) to prevent leakage and abnormal wear caused by the oil seal working under eccentric conditions.
Through the above introduction, Pe Gasket Manufacturers hopes that you can simply refer to the content of this article in future use.
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Last Update : 18 March 2021 5:30 PM
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