Issue of turbine bearing housing being concentric with the shaft
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As indicated in the figure: 1. The red line in the middle is the shaft, which is placed on top and supported at both ends by bearing bushes. 2. Using a combined level, it was measured that the levelness of the bearing housing on the left side is such that the left side is higher than the right side; similarly, when using the combined level on the shaft on the left side, it was found that the left side of the shaft is lower than the right side. 3. It can be understood as “the camber of the bearing housing is different from that of the shaft, and they are exactly opposite to each other.” 4. How can this situation be resolved?
It is recommended to take more readings, measure at different locations, and try using a frame level as well. For reference.
Ensure that the camber at the thrust bearing is consistent with the rotor’s camber
If problems are suspected on both sides, press down on the sliding bearings on those sides and remove all the other oil seals and gas seals. Create a fake shaft, and mount the lever dial indicator on this fake shaft. Find a few machined surfaces on each side and machine a circle on them; then determine the levelness on the machined surfaces of the dummy shaft (use a level, checking two surfaces at two points). In this way, deviations in all directions—up, down, left, and right—can be detected.
When using the level gauge attached to the front bearing housing on the left side, measuring the levelness of the front bearing shell shows that it is higher on the left side and lower on the right side. Similarly, when using the level gauge attached to the rear bearing housing on the right side to measure the rear bearing shell, the levelness should be 0 (a zero slope is required as specified in the manual), or it should be 1 thread higher on the side closest to the motor
Are you referring to the levelness inspection of the bearing shells or the levelness inspection of the shaft bearings?