High current in the water ring vacuum pump
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If the current of a water ring vacuum pump is too high and the motor temperature can exceed 100 degrees, what could be the cause? It can meet the vacuum level requirements
Don’t imagine it; see how it actually works in practice. Which part of the motor gets hot (the motor bearings, or the motor stator?) ） ； What was the vacuum level on site originally, what is it now, and what is the target value?
First, it is necessary to determine whether it is a mechanical issue; after ruling that out, then examine the manufacturing process
The motor stator temperature is 100 degrees, and the motor bearing temperature is 58 degrees; both are quite high； The stator temperature of another identical vacuum pump motor is 70 degrees, and the motor bearing temperature is 46 degrees. The two units operate separately; with the same opening degree of the inlets and outlets, they can both achieve a vacuum level of -60 kPa
Excessive current when the equipment is running idle is a problem with the equipment itself; if the current level is normal when the equipment is idle, then the excessive current after adding water is related to the process operations. If there are issues with the vacuum, it means there are leaks or poor sealing.
A high current in a water ring pump is usually caused by an excessive amount of water flow; it could also be due to slight friction between the disk and the impeller
Stop for a while and turn the shaft to check for any scratches, and examine whether there are any issues with the alignment
First, check the machinery to rule out motor faults; in most cases, it’s due to shaft misalignment, friction resulting from a small gap between the impeller and the distribution plate, or damage to the bearing at the fixed end.
This post was last edited by wx_Shuoliang 21648 on 2020-8-26 at 13:56. There are mainly a few reasons for excessively high motor temperature: 1. Is the water flow too high, causing operational overload? 2. Are the exhaust air temperature or water inlet temperature too high, and is the condenser functioning properly for heat exchange? 3. Is there any damage or misalignment in the motor section? Is there any unusual noise when the motor temperature is too high? Is the water ring vacuum pump closed or open?
Coupling misalignment or diaphragm damage； Wear of the motor bearings has caused problems with the fit ； Issues such as changes in the gap between the impeller and the backplate should be ruled out as mechanical problems first