Why do hexagonal washers break down so often?
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Dear fellow sailors, I have a question: our unit has a pump, and the hexagonal gaskets keep breaking – they need to be replaced almost once a week. What could be the problem?
Is it an octagonal pad or a hexagonal pad? Suspect that the material of the gasket was not chosen correctly
It’s a hexagonal gasket; other pumps also use hexagonal gaskets made of this material. It’s this pump that breaks down frequently
You are currently using a three-claw coupling, with the hexagonal elastic blocks made of rubber. These yellow elastic blocks are much better than the black ones. The reason for damage to these elastic blocks could be a lack of concentricity between the pump and the motor, either vertically or horizontally; there may also be a large gap between the couplings, as well as uneven alignment of their centers, all of which can lead to severe damage to the elastic blocks. Another possible cause is that the pump head rotates unevenly, and when the motor starts directly, the sudden increase in speed exerts significant stress on the elastic blocks. In such cases, it is possible to repair the pump head or install an inverter at the motor’s power supply to enable soft starting
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This post was last edited by “The Moon is Round in My Hometown” on January 6, 2018, at 13:29. We call it a coupling spring block. The main reasons for easy damage are as follows: issues with the size of the spring elements (or in other words, gaps – there should not be large gaps after the spring elements are inserted; being too loose can lead to damage) ； The pump is not properly aligned ； The mass of the spring block is poor quality ； For reference only.
It is likely that the shaft is not fully aligned, or it hasn’t been leveled properly. This results in uneven stress distribution.