Seeking help regarding excessive vibration in a double-suction pump
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Motor: 6 kV, 280 kW, 1450 revolutions per minute; Pump: 1000 cubic meters per hour, 75 meters head. Pump inlet 350. The inlet main pipe has a diameter of 500 and a length of 8 meters. When the pump is running, whether the outlet valve is open or closed, the vibration in the direction of the pump’s inlet and outlet is 8.5; the axial vibration is 7; and the vibration in the other axial direction is 3.5. Could everyone please help investigate the cause? The coupling alignment error is less than 20 microns.
It’s probably the circulating water pump: 1. Check the axial clearance of the coupling; 2. Verify whether the pump is properly vented; 3. If it uses a packing, check for air leaks – it might also have water leaks, and the absence of water leaks does not mean there are no air leaks. 4 Even after the pump itself has been filled, it is necessary to check whether air is still being discharged from the higher parts of the remote system. 5. Whether the bearing housings are concentric.
Check whether the foundation anchor bolts are loose, what the temperature of the medium is, consider the thermal expansion of the pump body, and determine what type of connection is used for the coupling. It seems to be a center-opening pump from Southern Pump Industry.
The possibility of seal failure due to circulating water fillers is low. Is the pump new equipment? What about impeller balance?
1. The axial clearance of the coupling is 5 millimeters; 2. The pump exhaust is completely cleared. 3 Mechanical seal. 4 Backflow. 5 It has not been checked whether this bearing seat is concentric. The focus might be on this now – how to check it?
Clear water. The vibration of the pump foot in all directions – up, down, front, back, and sides – is 0.4, which is very good. It’s the pulsing at the drive end. The amplitude is about 0.15 millimeters. The non-driven side is 0.04 millimeters.
New pump. Now, apart from the inability to confirm whether the bearing positions are concentric, the other basic checks have been carried out
Please give me your phone number so I can consult you directly
Right. An energy-saving company, available at any time to discuss matters related to system energy savings. 18606252595 holes
Where did you get that new pump?