Abstract
Based on the analysis of dynamic seal failure mechanism, this paper found that the dynamic seal would experience three phases before it failed completely. These three phases includes early extrusion phase, mid-term extrusion phase and final leakage phase. In final leakage phase, the failure of the dynamic seal could be detected by measuring the pressure disturbance on low-pressure side. The paper further studied the dynamic response of the crankshaft caused by the failure of dynamic seal in its early extrusion and mid-term extrusion phase, and found that the failure of the dynamic seal in extrusion phases could be detected by measuring the transient response of the crankshaft bearing. With these two methods, developing intelligent machine which can predict the failure of dynamic seal becomes possible.
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