Leakage problem with Dalian Hammett shielded pumps?
Thread Content
This post was last edited by “A line that can’t be any saltier” on 2021-11-2 at 18:14. I’m a complete novice when it comes to repairs. I’d like to ask about the axial play of the Himitik centrifugal pump. As shown in the assembly diagram, the theoretical axial play before installing the impeller is 2.9 mm; after installation, it becomes 1.9 mm. How did this 1 mm of play disappear? Is it because of the contact between the back of the impeller and the wear-resistant plate? ? ? I am extremely grateful
Don’t sink. If you know, please explain it
This post was last edited by 3983596_FPPZ on 2021-10-16 at 17:26. Part wear, deformation, improper installation, as well as the accumulation of machining errors in the various components of the initial assembly dimension chain, can all cause this gap to deviate from the theoretical value. This theoretical value is the ideal value specified by the manufacturer; it is not necessarily the actual gap of the pump at the time it leaves the factory. A gap of 1.9 mm seems appropriate for ordinary shielded pumps, unless the pump is particularly large. This is for reference only.
I have written a paper on its principle of balance. It explains in detail its balancing principle. {:9005:} Back loop.
Check the relevant information; I remember that there is a G value specified for the back side of the impeller in the imperial standard, with a requirement of 0.5 mm. For Hymeritik products, it’s sufficient to adjust it according to the specifications in the drawings. In your case, the back side of the impeller is in contact with something – by measuring which surface is in contact, you’ll be able to find out
The purpose of generating a displacement is to calibrate the displacement instrument; an impeller must be installed for this purpose, and the installation zero point of the displacement sensor is adjusted or rechecked based on this displacement.
The thrust bearing is working; the clearance is too large. Let’s check whether the shims behind it need to be replaced
How do I adjust this? Every time we reinstall it, the serial numbers aren’t entered correctly, but it still works fine when it’s running
It is recommended that the poster delete the image, as it can easily lead to unauthorized use...
This post was last edited by pump-fans on 2021-10-21 09:10. There may be shims behind the thrust bearing; some manufacturers rely on machining to ensure proper alignment, while in the former case the shims are adjusted, but since it’s already designed that way in the latter case, no adjustment is needed