Pump couplers are one of the many components used in a pump. The couplers connect the motor shaft and the pump shaft together. This allows the motor to transmit power to the pump. There are several different types of pump couplings you can choose, such as elastomeric, grid, gear, or disc. Each coupler is better suited for different types of applications, so in order to choose the right one, it depends on what you need it for. However, no matter what type of coupler you choose, the issues they may have when they break down are the same. This guide goes through the common problems pump couplers can have and how to troubleshoot them.
Misalignment
Misalignment is one of the most common issues with pump couplers. The misalignment happens for many reasons:
Faulty initial alignment
Distortion from pipe strain
Weak base support
In order to offset the issue, it is better to use a more flexible coupler that permits radial and axial misalignment.
Indicators of misalignment are changes in running noises, shaft seal leakage, premature bearing failure, and premature wear of the coupler inserts. In order to fix the issue, follow these steps:
Shut down the entire unit.
Check for misalignment.
Check the coupler inserts for signs of wear. Replace with new ones if necessary.
Change the coupler to a double cardanic space coupler.
Improper Fit
A coupler is only as good and efficient as its fit. Improper fitting couplers will not benefit the pump at all and may compromise the life cycle of the pump. Consider getting double cardanic space couplers instead of single. They cost more but should last longer than the other, which may end up saving you money in the long run.
Indicators of improper fits are a movement of the hub on the shaft, the coupler's fastener loosening up, changes in the assembly gap, or damaged components. To fit an improper fit, you should:
Shut down the pump unit.
Check all the shaft sizes for proper fitting.
Tighten all fasteners to the correct tightening torques.
Overload
Overload can cause premature coupler failure in a pump system. In order to prevent this from happening, you should size the pump couplers for peak motor starting torques. Review the peak power the system will go through during abnormal conditions and evaluate the extremes before assembling the pump couplers.
Indicators of overload include: premature wear on the inserts and deterioration of the inserts. To solve this issue, you can check the temperature of the insert and replace it if is necessary.
Conclusion
If you need help troubleshooting your pump couplers, it is okay to hire a professional to do it for you. Improper repair may cause more issues than the original problem. Pump contractors can handle the problem with minimal fuss and a small fee.
Share26 September 2017
I have always been someone who loves to know more about the way the world works, which is part of the reason I started reading about industrial and manufacturing processes. I have always found it fascinating that professionals can create things by hand, and so I started attending factory tours, asking questions, and doing as much research as possible. It was really interesting to see how much of a difference my efforts made, and before I knew it, I was able to completely change the way I thought about manufacturing. This blog is here to help other people to appreciate the majesty of industry. Check it out!
