Current Status of Hybrid Bearing Damage Detection
| Autor: | Joseph M. Certo, Wilfredo Morales, Paula J. Dempsey |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Engineering
Bearing (mechanical) business.industry Mechanical Engineering Mechanical engineering Condition monitoring Fluid bearing Surfaces and Interfaces Surfaces Coatings and Films law.invention Mechanics of Materials law Catastrophic failure visual_art visual_art.visual_art_medium Ball (bearing) Lubrication Ceramic business Turbopump |
| Zdroj: | Tribology Transactions. 48:370-376 |
| ISSN: | 1547-397X 1040-2004 |
| DOI: | 10.1080/05698190591008568 |
| Popis: | Advances in material development and processing have led to the introduction of ceramic hybrid bearings for many applications. The introduction of silicon nitride hybrid bearings into the high pressure oxidizer turbopump, on the space shuttle main engine, led NASA to solve a highly persistent and troublesome bearing problem. Hybrid bearings consist of ceramic balls and steel races. The majority of hybrid bearings utilize Si3N4 balls. The aerospace industry is currently studying the use of hybrid bearings and naturally the failure modes of these bearings become an issue in light of the limited data available. In today s turbine engines and helicopter transmissions, the health of the bearings is detected by the properties of the debris found in the lubrication line when damage begins to occur. Current oil debris sensor technology relies on the magnetic properties of the debris to detect damage. Since the ceramic rolling elements of hybrid bearings have no metallic properties, a new sensing system must be developed to indicate the system health if ceramic components are to be safely implemented in aerospace applications. The ceramic oil debris sensor must be capable of detecting ceramic and metallic component damage with sufficient reliability and forewarning to prevent a catastrophic failure. The objective of this research is to provide a background summary on what is currently known about hybrid bearing failure modes and to report preliminary results on the detection of silicon nitride debris, in oil, using a commercial particle counter. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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