High temperature of the shaft bearing in multi-stage centrifugal pumps
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Seeking help: I have a multi-stage feed pump used for handling residue oil as the medium, and the temperature of the bearing shells on the shafts is quite high, around 70 degrees. The pump was manufactured by Jialiite. What solutions can be suggested?
Reply to 1# Chemical Kid: Check whether the vibration of the pump is within acceptable limits, test the lubricating oil to see if it meets the specifications, determine if the pump is operating under overload conditions, check whether the rotor alignment is proper, measure the clearance of the bearing shells, and inspect the motor bearings – analyzing the situation requires knowing all these installation and operation parameters
Reply to 2# linweihua6: The vibration levels are within acceptable limits; the oil quality, bearing clearances, and all other process parameters, as well as the maintenance data, are all within specified requirements. It is the high temperature of the supporting bearings that is the issue
Reply to 3# Chemical Kid: Oh, a high temperature of the support tiles is usually due to the tiles being installed at too high an elevation; adjust it accordingly； Or check that the contact area between the bearing shell and the shaft should be no less than 70%; if not, it is necessary to use a bearing shell
Check whether the contact area of the bearing shells (>70%), contact angle (60°–90°), tightening force on the back of the shells, as well as the top and side clearances meet the standards； Next, check whether the adjustment screw is tightened, as well as the coaxiality of the rotor with the stationary part ； Finally, check whether the alignment data is out of tolerance.
Thank you for your answer; it solved the problem of high bearing pad temperature for me. Thank you and learned* :victory: