1993-04-01

A Prototype Fiberoptic Deflectometer for SSME Turbopump Bearing Health Monitoring 931361

A fiberoptic deflectometer is under development to diagnose bearing degradation of the turbine end bearings of the Space Shuttle Main Engine (SSME) high pressure oxidizer turbopump (HPOTP). The deflectometer, which measures bearing outer race deformations, provides better diagnostic sensitivity than traditional diagnostic sensors (such as accelerometers). The sensor construction, materials, and method of bringing the optical signal out of the HPOTP are described. Accuracy and repeatability results obtained in a static liquid nitrogen test rig are presented. Finally a potentially viable solution to the difficult problem of calibration in cryogen is discussed.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
X