Seal failure index

2.0 Oil barrier seals

Oil barrier seal index

2.4 Failure due to temperature

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	Figure 2.4 Three equidistant deposits of oil oxidation products on a radial face seal
Main Characteristics	Radial face seals are also used as oil barrier seals. Again, problems can occur because of high temperature in the seal. Figure 2.4 shows a seal ring that was removed because of excessive inward leakage of oil. This was caused by three equispaced deposits that separated the faces. Analysis showed the deposits to be oxidised oil. The ring was found to have a three-wave undulation, the thin film at the high spots causing excessive temperature leading to the deposition of oil oxidation products. Distortion had resulted from the relief of locked-in stresses during manufacture in a three-jaw chuck. The problem was solved by stress relieving before final machining.
Cause
Note
Possible Confusion with Other Types of Damage
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