Problems with the installation of diaphragm couplings
Thread Content
A batch of centrifugal pumps is equipped with double-diaphragm couplings; currently these pumps are being tested individually. Upon removing the diaphragms, it was found that they could not be reinstalled, and some of them could not even be taken out. The diaphragm coupling was chosen at that time to prevent the equipment from loosening during maintenance. . . What’s going on here? ? ? ?
It may be that the installation position or method of the diaphragm coupling is incorrect, or the diaphragm chosen is not suitable. It is also possible that the diaphragm has aged and deformed, and needs to be replaced. It is recommended to contact the manufacturer or professional technicians for inspection and repair. At the same time, during regular use, pay attention to periodic inspection and maintenance to avoid similar problems. .
Is it a coupling with an extended section in the middle?
There are requirements regarding the distance between couplings of each pump; if the distance is too small, it will be impossible to remove them. You can check the technical documentation to see what the required spacing for the couplings is, and adjust it accordingly!
It is recommended to contact the pump manufacturer to come and perform maintenance
If the shaft spacing is too small, and the motor uses bearing shells, consider whether it will not be on the magnetic center line after the motor stops running
Check the shaft spacing and the deformation of the diaphragm； Check the alignment (whether the flanges of the diaphragm are parallel); you can loosen the motor bolts to make slight adjustments to the shaft spacing. Choose pumps and couplings from reputable manufacturers
It is caused by the mismatch between the motor foot size and the pump base size.
Install all couplings at the intervals specified in the drawings
May I ask the original poster, what was the ultimate reason, and how was it resolved?