I would like to ask why a gap of 0.1–0.25 is required between the inner ring of the thrust bearing of a centrifugal pump and the locking washer
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I would like to ask why a gap of 0.1–0.25 is required between the inner ring of the thrust bearing in a centrifugal pump and the locking washer, and how can this be ensured during installation? Is it unnecessary to leave a gap?
That is the gap between the bearing cover and the outer ring of the bearing, provided for thermal expansion
You are probably referring to the outer ring of angular contact ball bearings. It is necessary to take into account the amount of expansion that occurs due to heat generation in the bearings; otherwise, a lack of axial expansion while there is radial expansion can lead to reduced bearing clearance and ultimately cause the bearings to lock up
Upon closer inspection of the diagram, it indeed refers to the outer ring; I originally thought the marking indicated the clearance on the shaft, which was a misunderstanding.
Have you taken a close look at this picture above? . . This means that the starting point of the shaft thread should be 0.1–0.25 smaller than the thickness of the two angular contact bearings; in other words, the shaft thread needs to extend about 0.1–0.25 into the bearings.
Just tighten the locknut and washer; that’s all that’s needed
These two gaps are the gaps between the bearing cover and the outer ring of the bearing, and they are provided for the expansion of the bearing.
The clearance on the outer ring of the positioning end bearing is generally 0.1mm
I misread the drawing (the positions indicated by the designer can also be easily misunderstood); it refers to the gap between the gland and the outer ring of the bearing, not the gap between the inner ring and the round nut
Looking at this diagram, it seems to be meant to prevent hitting the opposite retaining ring