The correction and leveling of the bearing box shall meet the following requirements:
1 The bearing box and the base shall be tightly bonded.
2 When the overall installation of the bearing box is leveling, vertical and transverse horizontal degree is measured on the midface of bearing box by gradienter. The longitudinal horizontal degree can also be measured on the spindle. The tolerance of the horizontal and horizontal levelness shall not exceed 0.10/1000.
3 When the left and right split type bearing box is leveling, the level of the horizontal and horizontal levelness shall be measured on the surface, and the levelness of the main shaft shall be measured on the main shaft. The tolerance of the levelness shall be in accordance with the following requirements:
The vertical levelness of each bearing box shall not exceed 0.04/1000.
The lateral levelness error of each bearing box shall not exceed 0.08/1000.
The levelness error of the main shaft shall not exceed 0.04/1000.
4 For the ventilator with sliding bearing, the contact between bearing and journal should also be checked, the bearing clearance and pressure cover interference should be checked, and if it is not up to standard, repair and adjustment should be carried out.