How many holes are there on the round nuts and stop washers for pump bearings? How many can you see?
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This post was last edited by 3983596_FPPZ on 2018-10-24 09:42. Round nuts (GB 810-1988) and the corresponding retaining washers (GB 858-1988), as a common design for securing rolling bearings, are frequently used in pump bearings. In actual use, there are several minor issues that beginners often overlook, which can lead to problems during assembly. These issues aren’t major nor trivial, but they can easily trip up novice technicians. The three such issues are as follows: Issue No. 1 – The position of the claws on the stop washer (also known as a flower washer or turtle washer) used to determine the installation direction of the round nut is itself inclined. The side of the round nut also has an inclined large chamfer. During assembly, these two inclined surfaces need to fit together properly; otherwise, the round nut will deform the stop washer, affecting the assembly process. Pit No. 2 – Maximum shaft diameter for installing the stop washer. The stop washer has an internal stop tooth (a small lip) that is supposed to fit into the corresponding groove on the shaft; this internal stop tooth has a specific distance dimension a (as shown in the standard diagram). Before the internal stop tooth is inserted into the groove, all shaft diameters through which the stop washer must pass must be smaller than dimension a, otherwise the stop washer will not be able to make its way to the installation position. Pit No. 3 – The length of the groove on the axis: The groove on the axis must be long enough, and the internal stop tooth should have a sufficient width to ensure that the internal stop tooth of the washer can fit smoothly into the groove; otherwise, it will get stuck at the threaded chamfer at the end of the R-shaped curve and be unable to pass through. I should have included diagrams to illustrate it, but unfortunately my computer is encrypted and I’m unable to upload images. Please forgive me; those who can’t understand it…
In fact, using a turtle pad is quite troublesome
In fact, choosing a round nut with a rotation direction opposite to that of the pump during design can reduce a lot of unnecessary complications
That would lead to lack of versatility, cause management chaos, and make procurement more difficult as well
The products per unit are quite varied; most of them have already been finalized, so it’s not possible to standardize them right away
What does Pit No. 3 mean? Could you describe it?