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What are the performance characteristics of the sealing material of the rubber sealing air film dynamic and static ring

Release time:

2019-04-23 12:30

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What are the performance characteristics of the sealing material of the rubber sealing air film dynamic and static ring?
As one of the indispensable important parts (sealing elements) of the rubber sealing gas film dynamic and static ring in the mechanical seal, the selection (selection) of the sealing material (material) can greatly improve the sealing performance of the mechanical hydraulic seal in operation (operation) Good performance, stability and the service life of the seal.
The study found that the performance of the sealing material is mainly affected by the hardness, stiffness (elastic modulus), strength, toughness, self-lubrication, thermal properties (such as thermal expansion, thermal conductivity), density, high and low temperature resistance, chemical resistance, tribological properties, pu value and the permeability of the seal, will directly affect the "sealing effect".
In order to have a more comprehensive understanding of the performance of the sealing material (material), a simple analysis is carried out twice. What kind of performance does the sealing material of the hydraulic sealing rubber sealing air film dynamic and static ring have?
The "thermal performance" of the sealing material performance of the 1. rubber sealing air film dynamic and static ring-the coefficient of expansion is an important parameter for the thermal deformation of the sealing surface caused by the temperature gradient, and it is also a very important key parameter for the sealing material (material) to resist thermal shock.
Thermal conductivity is critical to the conduction of heat generated by friction at the seal interface and to the cooling fluid. Low expansion coefficients minimize thermal shock, while high thermal conductivity minimizes temperature gradients. Temperature gradients and thermal shock can cause thermal stress cracking or thermal fatigue cracking.
For example, heat capacity is very important when instantaneous heating affects thermal stress and is available when determining mechanical seal flushing.
2. the "density" density of the sealing material performance of the rubber sealing gas film dynamic and static ring-when eccentricity or deflection and quality are important, it is one of the important influencing factors of sealing dynamics and also very important when determining the stress induced by centrifugal influence.
The low density of the rotating ring reduces inertia and balance problems. The "temperature resistance" of the sealing material performance of the 3. rubber sealing air film dynamic and static ring is the temperature resistance performance-resistance to friction and high setting ambient temperature, so as not to deform or lose mechanical performance.
The "chemical resistance" of the sealing material performance of the 4. rubber sealing air film dynamic and static ring is resistant to chemical performance-the chemical compatibility with the fluid and any impurities present at the operating temperature needs to be checked.

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