Steam Generator Main Feed Pump Radial Bearing Modification

Out-board Bearing

In-board Bearing

Out-board bearing cover removed The CURRENT bearing temperature detector enters the bearing in the center, east side. Oil supply inlet Original style bearing installed. Out-board bearing cover removed

In-board bearing cover removed Bearing temperature detector enters the bearing in the center, right (west) side. Oil supply inlet In-board bearing cover removed

The NEW and the OLD

New Style Tilting Pad Radial Bearings Notice that the bearings are DIRECTIONAL, and are installed in ONE direction of rotation. The new bearings have temperature detectors (RTD’s) installed INTO the bottom shoe.

NEW STYLE out-board bearing installed

RTD Lead With the new bearing installed in the correct rotational direction, the RTD leads will exit the bearing on the PUMP SIDE of the bearing and will exit the housing on the west side. Which is opposite of the original installation.

NEW STYLE in-board bearing installed

With the new bearing installed in the correct rotational direction, the RTD leads will exit the bearing on the COUPLING SIDE of the bearing. The RTD leads will go though the web of bearing saddle and will exit the housing on the west side.

Bearing RTD lead exits the in-board Bearing house on the west side. RDT lead where it exits the bearing on the coupling side, and goes through the bearing saddle.

SGFP 23

SGFP 21

The End