Multi-stage pump (two-stage)
Thread Content
The mechanical seal has two vibrations, driving and non-driving, as shown in the picture. Can someone please analyze the reason?
It is estimated that the coupling is not properly aligned horizontally.
1. Match the inlet and outlet flanges and check whether there is any opening, causing pipeline stress to be exerted on the pump body. 2. Check the coupling alignment. However, judging from the vibration data, both the motor and the pump vibrate greatly in the horizontal direction, so the probability of poor coupling alignment is relatively small. 3. Are the bolts tightened? ； 4. Is there any abnormal noise during operation?
The entrance and exit haven't been touched for a long time. It's just the foundation that was just put on some time ago (around January 7 or 8), and it just started to be turned today (the outdoor temperature is about ten degrees below zero recently)
First disconnect the coupling and test the motor alone. The vibration at the motor end is high. After removing the motor, re-center the coupling and try again.
Test the motor alone, disconnect the inlet and outlet flanges, and check whether there is excessive stress!
Judging from your vibration data, it seems that the foundation is too soft. The pump and motor should be fine. The foundation strength of the equipment should be reinforced!