The actual machine performance of rubber seals should be investigated:
1. Sealing performance
Sealing performance is the most important requirement for seals and sealing devices. The amount of leakage at the sealing ring is an indicator to measure the sealing performance. It is not only the seal that affects the sealing performance, but the entire sealing device after various seals are installed and combined with various elements of the sealing coupling surface.
2. Eccentricity resistance
Here is the eccentricity resistance performance after considering the actual gap runout and applying a certain eccentric load.
3. Friction (minimum working pressure)
The friction force in practical application is evaluated by the minimum working pressure. For reciprocating dynamic seals, the starting friction is greater than the dynamic friction, which is more complicated and affects the starting performance. It is practical to measure the sealing friction with the minimum starting working pressure. Therefore, for dynamic seals, the minimum working pressure is generally given.
4. Comprehensive performance
The comprehensive performance requires the sealing device to meet the above performance requirements under the specified working conditions and work for a certain period of time, so this index also reflects that the sealing is generally given the minimum working pressure.