Several factors affecting sealing performance
Time:
2021-09-15
1. Movement speed
When the movement speed is very low (<0.03u/s), the stability of the equipment operation and whether there is a "crawl" phenomenon must be checked. The movement speed is very high (>
0.8u/s), the lubricating oil legs may be damaged, and the oil seals will rub and heat due to the lack of good lubrication, which will greatly reduce the service life.
It is recommended that polyurethane or lemon plastic oil seals work within the speed range of 0.03n/s~0.8n/s.
2. Temperature
Low temperature will reduce the elasticity of polyurethane or rubber-plastic oil seals. Causes slippage, and even the entire oil seal becomes hard and brittle. High temperature will cause the volume of the oil seal to expand.It becomes soft, causing the friction resistance of the oil seal to increase rapidly and the pressure resistance capacity to decrease during movement. It is recommended that the continuous working temperature range of polyurethane or rubber-plastic oil seals is -10C to +80C.
3. Work pressure
Oil seals have minimum service pressure requirements. For low-pressure work, oil with low friction performance and low starting resistance must be selected.
seal up. Below 2.5MPa. Polyurethane oil seals are not suitable: when high pressure, the baby considers the pressure deformation of the oil seal. Anti-extrusion book ring for lightning, grooved
There are also special requirements in terms of work. .
In addition, oil seals of different materials have different optimal working pressure ranges. The optimal working pressure range for the polyurethane oil seal is 2.5~31.5MIPa.
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