The connection between the centrifugal pump motor and the coupling often breaks! ! What’s going on? ?
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The bolts between the pump motor and the coupling broke twice in half a year. Because the process requirements specify that there should be no check valve at the pump outlet, with only a control valve used to regulate the flow rate. Looking for a solution? ?
During pump operation, the flow rate indicated by the outlet flow meter is higher than the pump’s rated flow rate. .
What kind of pump are you? A centrifugal pump. Could it be a check valve that is failing, allowing the medium to flow back and causing the pump to rotate in reverse? The motor then rotates in the forward direction, resulting in excessive torque that leads to breakage. I suggest you switch to variable-frequency pumps, which can adjust the flow rate via frequency variation. I’m not sure if that will work There’s still hope for saving the market, but the quality of the products you buy is terrible: lol
Agree with the analysis above. A check valve should be installed at the pump outlet!
The coupling bolts are subjected to shear forces during the operation of the pump; failure occurs when the resistance is greater than the allowable stress of the bolts. 1. Frequent starting 2. Increased power 3. Increased instantaneous stress. Consider replacing the coupling and trying a larger one
1. Excessive load. 2. Backflow of the medium, resulting in tearing. 3. Quality issues. 4. What is your manufacturing process? Why is no check valve required? I hope the original poster will kindly share their insights
Can just replacing it with a larger coupling solve the problem? ? Are there any spare parts that can prevent the impeller from rotating in reverse? .
Because this pump does not operate continuously. . Frequent starting and stopping
The purification process requires that there be no residual material in the pipelines and pump casings. . phased
We have encountered this situation before; the cause was an excessive misalignment of the pump. Ask the mechanic to mark it down