Shaft Grounding Brushes
Shaft Earthing Brushes

Babbitt Bearings, Surface Damage


D10000
DAMAGE TO TILT-SHOE BEARING BY SHORT-CIRCUITED HOMOPOLAR-GENERATION LOOP WITHIN BEARING.

D10001
THRUST SHOE SEVERELY DAMAGED BY CURRENTS (FROSTED AREA). THE WEDGE-SHAPED AREA AT LEADING EDGE (RIGHT) IS THE ONLY REMAINING ORIGINAL SURFACE. AT THE WHITE TRIANGLE AT TRAILING EDGE , OUTSIDE DIAMETER, THE BABBITT IS COMPLETELY GONE AND SPARK EROSION HAS PROGRESSED INTO THE STEEL BACKING. METAL LOST AT THIS POINT IS 0.085". THE DARK AREA IS OIL CAKE. BEARING WAS CLOSE TO FAILURE.

D10002
SURFACE OF THRUST BEARING SHOE WHICH SHOWS DAMAGE DUE TO SPARK EROSION. NOTE HOW BABBITT SURFACE HAS BEEN PROGRESSIVELY ERODED GOING FROM RIGHT TO LEFT. ORIGINAL BABBITT SURFACE IS AT LOWER RIGHT.

D10003
SURFACE OF THRUST BEARING SHOE WHICH SHOWS DAMAGE DUE TO SPARK EROSION (SAME ITEM AS D 10 002). NOTE HOW BABBITT SURFACE HAS BEEN PROGRESSIVELY SPARK ERODED GOING FROM LEFT TO RIGHT. BABBITT HAS BEEN COMPLETELY REMOVED AT LOWER RIGHT CORNER.

D10008
TYPICAL SPARK-TRACKS ON A THRUST BEARING SHOE.

D10009
FIXED PAD THRUST BEARING SHOWING MODERATE AMOUNT OF FROSTING DUE TO SPARK EROSION. UNIT WAS EQUIPPED WITH OEM CARBON BRUSHES.

D10010
BOUNDARY BETWEEN "FROSTED" AREA AND ORIGINAL SURFACE AS SEEN THROUGH 30x MICROSCOPE. SAME BEARING SURFACE AS SHOWN IN D 10009.

D10049
FIXED PAD (TAPERED LAND) THRUST BEARING SURFACE DAMAGED BY SPARK EROSION. FULL VIEW OF BEARING. SAME BEARING AS SHOWN IN D 10009.

D10051
SPARK TRACKS ON TILTING PAD JOURNAL BEARING.

D10054
THRUST BEARING PAD, DAMAGE DUE TO SHAFT CURRENTS.

D10055
ENLARGEMENT OF D 10054.

D10040
TILT PAD JOURNAL BEARING WITH SPARK TRACKS.

D10045
TILT PAD JOURNAL BEARING WITH SPARK TRACKS.
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