On the clearance of angular thrust bearings
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When repairing centrifugal pumps, it is necessary to adjust the clearance of the two angular thrust bearings that are installed in pairs. I only know that the bearings have a fixed clearance of their own, but the axial clearance also needs to be adjusted during installation； When repairing pumps with experienced technicians, an axial clearance of 0.10~0.20 mm is always left in place, reportedly to prevent the bearings from seizing due to thermal expansion. Since there is no relevant information available, I don’t know how the parameters for adjusting this axial clearance are determined. I would like to ask how people usually adjust the axial clearance of bearings, and whether there are any standards that can be referred to.
It’s also based on experience passed down; as long as there are no issues with the maintenance and operation cycle, it’s fine
But the bearing clearance is related to the operating cycle, vibration, and temperature of the root pump; an appropriate clearance not only results in less vibration and lower temperature but also extends the operating cycle
Doesn’t everyone pay much attention to this issue usually? Seeking help from experts
It seems that a very thin gasket is placed between the two bearings; the exact thickness isn’t clear
We call that a spacer ring; I’m talking about the situation without a spacer ring!
The clearance of the angular thrust bearing for axial control in centrifugal pumps is determined based on the precision grade and clearance code. Generally, the axial clearance is between 0.10 and 0.20 mm; method of adjustment ； In a back-to-back bearing arrangement, the two inner rings are pressed together; the question is whether the outer ring can rotate freely. Use a feeler gauge to check that the gap between the two bearings is within the specified range – if the ring does not rotate, additional shims must be added for adjustment.
We carry out the installation face to face, and what is controlled is the gap in the outer ring; this is likely related to thermal expansion. I mainly want to ask if there are any standards that can be referred to.
This post was last edited by qwl on 2016-8-16 09:17. Face-to-face and back-to-back mounting of bearings: http://wenku.baidu.com/link?url= ... TgQMVgLuXmVVFPeZRxm. Refer to the bearing installation manual